diff --git a/configure.ac b/configure.ac
index f203fd793e..db7d23d022 100644
--- a/configure.ac
+++ b/configure.ac
@@ -230,7 +230,7 @@
     AC_FUNC_MALLOC
     AC_FUNC_REALLOC
     AC_CHECK_FUNCS([gettimeofday memset strcasecmp strchr strrchr strdup strndup strerror strncasecmp strtol strtoul memchr memrchr clock_gettime])
-    AC_CHECK_FUNCS([strptime])
+    AC_CHECK_FUNCS([strptime memmem utime])
 
     AC_CHECK_DECL([getrandom],
         AC_DEFINE([HAVE_GETRANDOM], [1], [Use getrandom]),
@@ -238,11 +238,6 @@
             #include <sys/random.h> 
             ])
 
-    AC_CHECK_FUNC([memmem],
-        AC_DEFINE([HAVE_MEMMEM], [1], [Use memmem]), [])
-
-    AC_CHECK_FUNCS([utime])
-
     OCFLAGS=$CFLAGS
     CFLAGS=""
     AC_CHECK_FUNCS([strlcpy strlcat])