diff --git a/tests/hash.c b/tests/hash.c
index 29d5073cc..cc4dc5fe5 100644
--- a/tests/hash.c
+++ b/tests/hash.c
@@ -19,6 +19,10 @@
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  */
 
+#ifdef HAVE_CONFIG_H
+    #include <config.h>
+#endif
+
 #include <stdio.h>
 
 #include <cyassl/ctaocrypt/md4.h>