diff --git a/libs/ui/include/psemek/ui/progress_bar.hpp b/libs/ui/include/psemek/ui/progress_bar.hpp
index 2c66609a..48b6ceac 100644
--- a/libs/ui/include/psemek/ui/progress_bar.hpp
+++ b/libs/ui/include/psemek/ui/progress_bar.hpp
@@ -1,19 +1,19 @@
 #pragma once
 
-#include <psemek/ui/element.hpp>
+#include <psemek/ui/single_container.hpp>
 #include <psemek/ui/label.hpp>
 
 namespace psemek::ui
 {
 
 	struct progress_bar
-		: element
+		: single_container
 	{
 		virtual float value() const { return value_; }
 		virtual void set_value(float value);
 
-		virtual struct label * label() { return nullptr; }
-		virtual struct label const * label() const { return nullptr; }
+		virtual struct label * label();
+		virtual struct label const * label() const;
 
 	private:
 		float value_ = 0.f;
diff --git a/libs/ui/source/progress_bar.cpp b/libs/ui/source/progress_bar.cpp
index 618b6538..47867a44 100644
--- a/libs/ui/source/progress_bar.cpp
+++ b/libs/ui/source/progress_bar.cpp
@@ -10,4 +10,14 @@ namespace psemek::ui
 		value_ = geom::clamp(value, {0.f, 1.f});
 	}
 
+	label * progress_bar::label()
+	{
+		return dynamic_cast<struct label *>(child().get());
+	}
+
+	label const * progress_bar::label() const
+	{
+		return dynamic_cast<struct label const *>(child().get());
+	}
+
 }