diff --git a/sysdep.h.in b/sysdep.h.in
index 1235d7b..f5ae24b 100644
--- a/sysdep.h.in
+++ b/sysdep.h.in
@@ -48,6 +48,9 @@
    If it doesn't then we expect it to have an n_un component. */
 #undef NLIST_HAS_N_NAME
 
+/* Define if you have ANSI strerror. */
+#undef HAVE_STRERROR
+
 /* Define if you have dlopen() and related routines (dynamic linking
    of shared object files). */
 #undef HAVE_DLOPEN