--- OLD/xc/lib/Xi/XUngrDvB.c	Thu Jan  1 00:00:00 1970
+++ NEW/xc/lib/Xi/XUngrDvB.c	Thu Jan  1 00:00:00 1970
@@ -53,6 +53,7 @@
 #include "Xlibint.h"
 #include "XInput.h"
 #include "extutil.h"
+#include "XIint.h"
 
 int
 XUngrabDeviceButton(dpy, dev, button, modifiers, modifier_dev, grab_window)