diff --git a/configure.ac b/configure.ac
index 4359dd88..a5a644e0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -294,7 +294,7 @@ then
 fi
 AC_SUBST(DEJAGNU)
 
-AC_CHECK_FUNCS([__fpending alarm atexit dup2 gethostname getpagesize gettimeofday iswprint memchr memmove memset nl_langinfo putenv regcomp rpmatch select setlocale strcasecmp strchr strcspn strdup strerror strncasecmp strndup strpbrk strrchr strspn strstr strtol strtoul strtoull strverscmp utmpname wcwidth])
+AC_CHECK_FUNCS([__fpending alarm atexit dup2 gethostname getpagesize gettimeofday iswprint memchr memmove memset mkdir nl_langinfo putenv regcomp rpmatch select setlocale strcasecmp strchr strcspn strdup strerror strncasecmp strndup strpbrk strrchr strspn strstr strtol strtoul strtoull strverscmp utmpname wcwidth])
 
 AC_CONFIG_FILES([Makefile
                  include/Makefile