diff --git a/mr/mr2200.h b/mr/mr2200.h
index bd0f01c87..425393a3d 100755
--- a/mr/mr2200.h
+++ b/mr/mr2200.h
@@ -2,6 +2,7 @@
 #define __MR2200_H
 
 #include <applicat.h>
+#include <colmask.h>
 #include "mrplib.h"
 
 #include "mr2100.h"