diff --git a/ext/openssl/xp_ssl.c b/ext/openssl/xp_ssl.c
index e251d2124a2..c6a91570cff 100644
--- a/ext/openssl/xp_ssl.c
+++ b/ext/openssl/xp_ssl.c
@@ -20,6 +20,10 @@
 
 /* $Id$ */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include "php.h"
 #include "ext/standard/file.h"
 #include "ext/standard/url.h"