diff --git a/libs/ui/source/controller.cpp b/libs/ui/source/controller.cpp
index 7e2554ba..57abd2bc 100644
--- a/libs/ui/source/controller.cpp
+++ b/libs/ui/source/controller.cpp
@@ -33,7 +33,7 @@ namespace psemek::ui
 				if (root)
 					root->reshape(bbox);
 				if (on_reshape)
-					on_reshape();
+					post(on_reshape);
 			}
 
 			geom::box<float, 2> size_constraints() const override