diff --git a/scsh/regexp/debug.c b/scsh/regexp/debug.c
index 99ce7da..bf40bbb 100644
--- a/scsh/regexp/debug.c
+++ b/scsh/regexp/debug.c
@@ -4,7 +4,7 @@
 #include <limits.h>
 #include <stdlib.h>
 #include <sys/types.h>
-#include <regex.h>
+#include "regex.h"
 
 #include "utils.h"
 #include "regex2.h"
diff --git a/scsh/regexp/main.c b/scsh/regexp/main.c
index 0221e77..72bb67f 100644
--- a/scsh/regexp/main.c
+++ b/scsh/regexp/main.c
@@ -1,7 +1,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <sys/types.h>
-#include <regex.h>
+#include "regex.h"
 #include <assert.h>
 
 #include "main.ih"
diff --git a/scsh/regexp/regcomp.c b/scsh/regexp/regcomp.c
index 42c3b86..5f2d275 100644
--- a/scsh/regexp/regcomp.c
+++ b/scsh/regexp/regcomp.c
@@ -4,7 +4,7 @@
 #include <ctype.h>
 #include <limits.h>
 #include <stdlib.h>
-#include <regex.h>
+#include "regex.h"
 
 #include "utils.h"
 #include "regex2.h"
diff --git a/scsh/regexp/regerror.c b/scsh/regexp/regerror.c
index e53dafc..a9c6dd6 100644
--- a/scsh/regexp/regerror.c
+++ b/scsh/regexp/regerror.c
@@ -4,7 +4,7 @@
 #include <ctype.h>
 #include <limits.h>
 #include <stdlib.h>
-#include <regex.h>
+#include "regex.h"
 
 #include "utils.h"
 #include "regerror.ih"
diff --git a/scsh/regexp/regexec.c b/scsh/regexp/regexec.c
index dcb11b2..2a5bcbd 100644
--- a/scsh/regexp/regexec.c
+++ b/scsh/regexp/regexec.c
@@ -11,7 +11,7 @@
 #include <string.h>
 #include <limits.h>
 #include <ctype.h>
-#include <regex.h>
+#include "regex.h"
 
 #include "utils.h"
 #include "regex2.h"
diff --git a/scsh/regexp/regfree.c b/scsh/regexp/regfree.c
index 9a6acf1..9c1488a 100644
--- a/scsh/regexp/regfree.c
+++ b/scsh/regexp/regfree.c
@@ -1,7 +1,7 @@
 #include <sys/types.h>
 #include <stdio.h>
 #include <stdlib.h>
-#include <regex.h>
+#include "regex.h"
 
 #include "utils.h"
 #include "regex2.h"