diff --git a/SDL2pp/Renderer.cc b/SDL2pp/Renderer.cc
index 1322420..ff11176 100644
--- a/SDL2pp/Renderer.cc
+++ b/SDL2pp/Renderer.cc
@@ -223,7 +223,7 @@ void Renderer::SetViewport(const Optional<Rect>& rect) {
 		throw Exception("SDL_RenderSetViewport failed");
 }
 
-bool Renderer::TargetSupported() {
+bool Renderer::TargetSupported() const {
 	return SDL_RenderTargetSupported(renderer_) == SDL_TRUE;
 }
 
diff --git a/SDL2pp/Renderer.hh b/SDL2pp/Renderer.hh
index 807d569..2950216 100644
--- a/SDL2pp/Renderer.hh
+++ b/SDL2pp/Renderer.hh
@@ -538,7 +538,7 @@ public:
 	/// \see http://wiki.libsdl.org/SDL_RenderTargetSupported
 	///
 	////////////////////////////////////////////////////////////
-	bool TargetSupported();
+	bool TargetSupported() const;
 
 	////////////////////////////////////////////////////////////
 	/// \brief Get the clip rectangle for the current target