diff --git a/src/arch/unix/x11/xaw/x11video.c b/src/arch/unix/x11/xaw/x11video.c
index 73f2c4e..891caf4 100644
--- a/src/arch/unix/x11/xaw/x11video.c
+++ b/src/arch/unix/x11/xaw/x11video.c
@@ -60,6 +60,7 @@
 #include <X11/Xutil.h>
 #include <X11/Intrinsic.h>
 #include <X11/cursorfont.h>
+#include <X11/Xmd.h>
 
 #include <stdio.h>
 #include <stdlib.h>