--- a/ui/motif/graphics.h	Sun Nov 29 21:43:03 2015 +0100
+++ b/ui/motif/graphics.h	Mon Nov 30 14:09:55 2015 +0100
@@ -51,6 +51,13 @@
     UiXlibGraphics gr;
 } UiDrawEvent;
 
+typedef struct UiMouseEventData {
+    UiObject    *obj;
+    ui_callback callback;
+    void        *userdata;
+    Time        last_event;
+} UiMouseEventData;
+
 struct UiTextLayout {
     char     *text;
     size_t   length;