diff --git a/config.h.in b/config.h.in
index 2a037e2..cbf0c24 100644
--- a/config.h.in
+++ b/config.h.in
@@ -83,6 +83,18 @@
    zero-length file name argument. */
 #undef HAVE_STAT_EMPTY_STRING_BUG
 
+/* stat struct has st_ctim field */
+#undef HAVE_STAT_ST_CTIM
+
+/* stat struct has st_ctimespec field */
+#undef HAVE_STAT_ST_CTIMESPEC
+
+/* stat struct has st_mtim field */
+#undef HAVE_STAT_ST_MTIM
+
+/* stat struct has st_mtimespec field */
+#undef HAVE_STAT_ST_MTIMESPEC
+
 /* Define to 1 if you have the <stdint.h> header file. */
 #undef HAVE_STDINT_H
 
diff --git a/configure b/configure
index 93d0305..42fe3fb 100755
--- a/configure
+++ b/configure
@@ -7277,6 +7277,432 @@ _ACEOF
 
 fi
 
+{ $as_echo "$as_me:$LINENO: checking for struct stat.st_mtimespec" >&5
+$as_echo_n "checking for struct stat.st_mtimespec... " >&6; }
+if test "${ac_cv_member_struct_stat_st_mtimespec+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (ac_aggr.st_mtimespec)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_mtimespec=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (sizeof ac_aggr.st_mtimespec)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_mtimespec=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_member_struct_stat_st_mtimespec=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:$LINENO: result: $ac_cv_member_struct_stat_st_mtimespec" >&5
+$as_echo "$ac_cv_member_struct_stat_st_mtimespec" >&6; }
+if test "x$ac_cv_member_struct_stat_st_mtimespec" = x""yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_STAT_ST_MTIMESPEC 1
+_ACEOF
+
+fi
+
+
+{ $as_echo "$as_me:$LINENO: checking for struct stat.st_mtim" >&5
+$as_echo_n "checking for struct stat.st_mtim... " >&6; }
+if test "${ac_cv_member_struct_stat_st_mtim+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (ac_aggr.st_mtim)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_mtim=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (sizeof ac_aggr.st_mtim)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_mtim=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_member_struct_stat_st_mtim=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:$LINENO: result: $ac_cv_member_struct_stat_st_mtim" >&5
+$as_echo "$ac_cv_member_struct_stat_st_mtim" >&6; }
+if test "x$ac_cv_member_struct_stat_st_mtim" = x""yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_STAT_ST_MTIM 1
+_ACEOF
+
+fi
+
+
+{ $as_echo "$as_me:$LINENO: checking for struct stat.st_ctimespec" >&5
+$as_echo_n "checking for struct stat.st_ctimespec... " >&6; }
+if test "${ac_cv_member_struct_stat_st_ctimespec+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (ac_aggr.st_ctimespec)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_ctimespec=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (sizeof ac_aggr.st_ctimespec)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_ctimespec=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_member_struct_stat_st_ctimespec=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:$LINENO: result: $ac_cv_member_struct_stat_st_ctimespec" >&5
+$as_echo "$ac_cv_member_struct_stat_st_ctimespec" >&6; }
+if test "x$ac_cv_member_struct_stat_st_ctimespec" = x""yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_STAT_ST_CTIMESPEC 1
+_ACEOF
+
+fi
+
+
+{ $as_echo "$as_me:$LINENO: checking for struct stat.st_ctim" >&5
+$as_echo_n "checking for struct stat.st_ctim... " >&6; }
+if test "${ac_cv_member_struct_stat_st_ctim+set}" = set; then
+  $as_echo_n "(cached) " >&6
+else
+  cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (ac_aggr.st_ctim)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_ctim=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	cat >conftest.$ac_ext <<_ACEOF
+/* confdefs.h.  */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h.  */
+#include <sys/stat.h>
+
+int
+main ()
+{
+static struct stat ac_aggr;
+if (sizeof ac_aggr.st_ctim)
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+rm -f conftest.$ac_objext
+if { (ac_try="$ac_compile"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:$LINENO: $ac_try_echo\""
+$as_echo "$ac_try_echo") >&5
+  (eval "$ac_compile") 2>conftest.er1
+  ac_status=$?
+  grep -v '^ *+' conftest.er1 >conftest.err
+  rm -f conftest.er1
+  cat conftest.err >&5
+  $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+  (exit $ac_status); } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest.$ac_objext; then
+  ac_cv_member_struct_stat_st_ctim=yes
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_cv_member_struct_stat_st_ctim=no
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:$LINENO: result: $ac_cv_member_struct_stat_st_ctim" >&5
+$as_echo "$ac_cv_member_struct_stat_st_ctim" >&6; }
+if test "x$ac_cv_member_struct_stat_st_ctim" = x""yes; then
+
+cat >>confdefs.h <<\_ACEOF
+#define HAVE_STAT_ST_CTIM 1
+_ACEOF
+
+fi
+
+
+
+
 # Checks for typedefs, structures, and compiler characteristics.
 { $as_echo "$as_me:$LINENO: checking for an ANSI C-conforming const" >&5
 $as_echo_n "checking for an ANSI C-conforming const... " >&6; }
diff --git a/configure.ac b/configure.ac
index c376883..990f45a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -90,6 +90,32 @@ AC_DEFINE(ENABLE_LIBFFI, 1, [adds support for libffi])
 
 fi
 
+AC_CHECK_MEMBER([struct stat.st_mtimespec],
+   AC_DEFINE(HAVE_STAT_ST_MTIMESPEC, 1, 
+             [stat struct has st_mtimespec field]),
+   [], 
+   [[#include <sys/stat.h>]])
+
+AC_CHECK_MEMBER([struct stat.st_mtim],
+   AC_DEFINE(HAVE_STAT_ST_MTIM, 1, 
+             [stat struct has st_mtim field]),
+   [], 
+   [[#include <sys/stat.h>]])
+
+AC_CHECK_MEMBER([struct stat.st_ctimespec],
+   AC_DEFINE(HAVE_STAT_ST_CTIMESPEC, 1, 
+             [stat struct has st_ctimespec field]),
+   [], 
+   [[#include <sys/stat.h>]])
+
+AC_CHECK_MEMBER([struct stat.st_ctim],
+   AC_DEFINE(HAVE_STAT_ST_CTIM, 1, 
+             [stat struct has st_ctim field]),
+   [], 
+   [[#include <sys/stat.h>]])
+
+
+
 # Checks for typedefs, structures, and compiler characteristics.
 AC_C_CONST
 AC_C_INLINE
diff --git a/scheme/last-revision b/scheme/last-revision
index 357a340..6c19a26 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1681
+1683
diff --git a/src/ikarus-io.c b/src/ikarus-io.c
index 2abcac4..898f0d4 100644
--- a/src/ikarus-io.c
+++ b/src/ikarus-io.c
@@ -297,6 +297,7 @@ timespec_bytevector(struct timespec* s, ikpcb* pcb) {
   return r + bytevector_tag;
 }
 
+
 ikptr
 ikrt_file_ctime2(ikptr filename, ikpcb* pcb){
   struct stat s;
@@ -304,7 +305,16 @@ ikrt_file_ctime2(ikptr filename, ikpcb* pcb){
   if(err) {
     return ik_errno_to_code();
   }
+#if HAVE_STAT_ST_CTIMESPEC
   return timespec_bytevector(&s.st_ctimespec, pcb);
+#elif HAVE_STAT_ST_CTIM
+  return timespec_bytevector(&s.st_ctim, pcb);
+#else
+  struct timespec ts;
+  ts.tv_sec = s.st_ctime;
+  ts.tv_nsec = 0;
+  return timespec_bytevector(&st, pcb);
+#endif
 }
 
 ikptr
@@ -314,7 +324,16 @@ ikrt_file_mtime2(ikptr filename, ikpcb* pcb){
   if(err) {
     return ik_errno_to_code();
   }
+#if HAVE_STAT_ST_MTIMESPEC
   return timespec_bytevector(&s.st_mtimespec, pcb);
+#elif HAVE_STAT_ST_MTIM
+  return timespec_bytevector(&s.st_mtim, pcb);
+#else
+  struct timespec ts;
+  ts.tv_sec = s.st_mtime;
+  ts.tv_nsec = 0;
+  return timespec_bytevector(&st, pcb);
+#endif
 }