diff --git a/src/arch/unix/x11/xaw/x11video.c b/src/arch/unix/x11/xaw/x11video.c
index 7e25b5d..2f86222 100755
--- a/src/arch/unix/x11/xaw/x11video.c
+++ b/src/arch/unix/x11/xaw/x11video.c
@@ -63,6 +63,7 @@
 #include <X11/Xutil.h>
 #include <X11/Intrinsic.h>
 #include <X11/cursorfont.h>
+#include <X11/Xmd.h>
 
 #include <stdio.h>
 #include <stdlib.h>