diff --git a/Xext/hashtable.c b/Xext/hashtable.c
index 2adf92e56..9d9ef8949 100644
--- a/Xext/hashtable.c
+++ b/Xext/hashtable.c
@@ -1,3 +1,7 @@
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
 #include <stdlib.h>
 #include "misc.h"
 #include "hashtable.h"