diff --git a/libs/ui/source/controller.cpp b/libs/ui/source/controller.cpp
index e0b302a1..83e53394 100644
--- a/libs/ui/source/controller.cpp
+++ b/libs/ui/source/controller.cpp
@@ -27,7 +27,7 @@ namespace psemek::ui
 
 			using element::reshape;
 
-			void reshape(geom::box<float, 2> const & bbox)
+			void reshape(geom::box<float, 2> const & bbox) override
 			{
 				shape_.box = bbox;
 				if (root)
diff --git a/libs/ui/source/default_element_factory.cpp b/libs/ui/source/default_element_factory.cpp
index c0785721..8d744dc8 100644
--- a/libs/ui/source/default_element_factory.cpp
+++ b/libs/ui/source/default_element_factory.cpp
@@ -320,18 +320,18 @@ namespace psemek::ui
 		{
 			struct shape const & shape() const override { return shape_; }
 
-			void reshape(geom::box<float, 2> const & bbox)
+			void reshape(geom::box<float, 2> const & bbox) override
 			{
 				shape_.box = bbox;
 			}
 
-			geom::box<float, 2> size_constraints() const
+			geom::box<float, 2> size_constraints() const override
 			{
 				static float const inf = std::numeric_limits<float>::infinity();
 				return {{{button_width(), inf}, {button_height(), inf}}};
 			}
 
-			void draw(painter & p) const
+			void draw(painter & p) const override
 			{
 				auto st = merged_style();