diff --git a/libnm-util/cipher-wep-passphrase.c b/libnm-util/cipher-wep-passphrase.c
index 6ebea11c18..6262cc5598 100644
--- a/libnm-util/cipher-wep-passphrase.c
+++ b/libnm-util/cipher-wep-passphrase.c
@@ -19,6 +19,10 @@
  * (C) Copyright 2005 Red Hat, Inc.
  */
 
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
 #include <glib.h>
 #include <iwlib.h>