diff -r 83c83a7aa552 -r b459361d98ad ui/gtk/toolbar.c
--- a/ui/gtk/toolbar.c	Tue Dec 16 18:09:15 2025 +0100
+++ b/ui/gtk/toolbar.c	Wed Dec 17 18:31:20 2025 +0100
@@ -197,7 +197,7 @@
         }
     }
     
-    UiVarEventData *event = cxMalloc(
+    UiVarEventData *event = cxZalloc(
                 obj->ctx->allocator,
                 sizeof(UiVarEventData));
     event->obj = obj;