diff --git a/libs/ui/include/psemek/ui/element.hpp b/libs/ui/include/psemek/ui/element.hpp
index 748abdf5..99370f41 100644
--- a/libs/ui/include/psemek/ui/element.hpp
+++ b/libs/ui/include/psemek/ui/element.hpp
@@ -65,10 +65,10 @@ namespace psemek::ui
 
 		virtual bool transparent() const { return false; }
 
-		virtual std::shared_ptr<struct style const> style() const { return style_; }
-		virtual std::shared_ptr<struct style const> own_style() const { return own_style_; }
-		virtual std::shared_ptr<struct style const> set_style(std::shared_ptr<struct style const> st);
-		virtual std::shared_ptr<struct style const> set_own_style(std::shared_ptr<struct style const> st);
+		virtual std::shared_ptr<struct style> style() const { return style_; }
+		virtual std::shared_ptr<struct style> own_style() const { return own_style_; }
+		virtual std::shared_ptr<struct style> set_style(std::shared_ptr<struct style> st);
+		virtual std::shared_ptr<struct style> set_own_style(std::shared_ptr<struct style> st);
 
 		virtual void style_updated() const;
 		virtual void own_style_updated() const;
@@ -89,8 +89,8 @@ namespace psemek::ui
 	protected:
 		virtual void release_children();
 
-		virtual std::shared_ptr<struct style const> merged_style() const;
-		virtual std::shared_ptr<struct style const> merged_own_style() const;
+		virtual std::shared_ptr<struct style> merged_style() const;
+		virtual std::shared_ptr<struct style> merged_own_style() const;
 
 		static bool in_text_input();
 		static void start_text_input();
@@ -101,10 +101,10 @@ namespace psemek::ui
 		async::event_loop * loop_ = nullptr;
 		bool enabled_ = true;
 		bool hidden_ = false;
-		std::shared_ptr<struct style const> style_;
-		std::shared_ptr<struct style const> own_style_;
-		mutable std::shared_ptr<struct style const> merged_style_;
-		mutable std::shared_ptr<struct style const> merged_own_style_;
+		std::shared_ptr<struct style> style_;
+		std::shared_ptr<struct style> own_style_;
+		mutable std::shared_ptr<struct style> merged_style_;
+		mutable std::shared_ptr<struct style> merged_own_style_;
 		bool reshape_posted_ = false;
 
 		mutable std::vector<util::function<void()>> delayed_callbacks_;
diff --git a/libs/ui/source/element.cpp b/libs/ui/source/element.cpp
index 5f8cee7f..6e723e40 100644
--- a/libs/ui/source/element.cpp
+++ b/libs/ui/source/element.cpp
@@ -71,7 +71,7 @@ namespace psemek::ui
 		return size_constraints()[1];
 	}
 
-	std::shared_ptr<style const> element::set_style(std::shared_ptr<struct style const> st)
+	std::shared_ptr<style> element::set_style(std::shared_ptr<struct style> st)
 	{
 		if (style_)
 			style_->use_as_style.erase(this);
@@ -86,7 +86,7 @@ namespace psemek::ui
 		return st;
 	}
 
-	std::shared_ptr<struct style const> element::set_own_style(std::shared_ptr<struct style const> st)
+	std::shared_ptr<struct style> element::set_own_style(std::shared_ptr<struct style> st)
 	{
 		if (style_)
 			style_->use_as_own_style.erase(this);
@@ -114,7 +114,7 @@ namespace psemek::ui
 		merged_own_style_ = nullptr;
 	}
 
-	std::shared_ptr<struct style const> element::merged_style() const
+	std::shared_ptr<struct style> element::merged_style() const
 	{
 		if (!merged_style_)
 		{
@@ -134,7 +134,7 @@ namespace psemek::ui
 		return merged_style_;
 	}
 
-	std::shared_ptr<struct style const> element::merged_own_style() const
+	std::shared_ptr<struct style> element::merged_own_style() const
 	{
 		if (!merged_own_style_)
 		{