diff --git a/src/sun_mouse.c b/src/sun_mouse.c
index 3b362c5..646c33a 100644
--- a/src/sun_mouse.c
+++ b/src/sun_mouse.c
@@ -47,6 +47,10 @@
  * XFree86 Project.
  */
 
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #ifdef HAVE_XORG_CONFIG_H
 #include <xorg-config.h>
 #endif