diff -r 1a786201465f -r efaae97bd95b ui/motif/menu.c
--- a/ui/motif/menu.c	Sun Nov 29 21:43:03 2015 +0100
+++ b/ui/motif/menu.c	Mon Nov 30 14:09:55 2015 +0100
@@ -264,7 +264,7 @@
                 obj->ctx->mempool,
                 sizeof(UiEventData));
         event->obj = obj;
-        event->user_data = mi->userdata;
+        event->userdata = mi->userdata;
         event->callback = mi->callback;
         event->value = 0;
         XtAddCallback(
@@ -323,7 +323,7 @@
                 obj->ctx->mempool,
                 sizeof(UiEventData));
         event->obj = obj;
-        event->user_data = mi->userdata;
+        event->userdata = mi->userdata;
         event->callback = mi->callback;
         event->value = 0;
         XtAddCallback(
@@ -376,7 +376,7 @@
                 obj->ctx->mempool,
                 sizeof(UiEventData));
         event->obj = obj;
-        event->user_data = ci->userdata;
+        event->userdata = ci->userdata;
         event->callback = ci->callback;
         XtAddCallback(
             checkbox,
@@ -499,7 +499,7 @@
             // TODO: use mempool
             UiEventData *event = malloc(sizeof(UiEventData));
             event->obj = list->object;
-            event->user_data = list->userdata;
+            event->userdata = list->userdata;
             event->callback = list->callback;
             event->value = i - 1;
 
@@ -524,7 +524,7 @@
     e.window = event->obj->window;
     e.document = event->obj->ctx->document;
     e.intval = 0;
-    event->callback(&e, event->user_data);    
+    event->callback(&e, event->userdata);    
 }