diff --git a/libs/app/include/psemek/app/app.hpp b/libs/app/include/psemek/app/app.hpp
index c7ea2539..4714ef49 100644
--- a/libs/app/include/psemek/app/app.hpp
+++ b/libs/app/include/psemek/app/app.hpp
@@ -30,8 +30,9 @@ namespace psemek::app
 		scene * set_scene(scene * s);
 
 		void show_cursor(bool show);
-		float time() const;
+		void vsync(bool on);
 
+		float time() const;
 		int width() const;
 		int height() const;
 
diff --git a/libs/app/source/app.cpp b/libs/app/source/app.cpp
index c56a378b..fa32331e 100644
--- a/libs/app/source/app.cpp
+++ b/libs/app/source/app.cpp
@@ -242,6 +242,23 @@ namespace psemek::app
 		return std::chrono::duration_cast<std::chrono::duration<float>>(clock::now() - impl().start_time).count();
 	}
 
+	void app::vsync(bool on)
+	{
+		if (on)
+		{
+			// try adaptive vsync
+			if (SDL_GL_SetSwapInterval(-1) != 0)
+			{
+				// failed, try usual vsync then
+				SDL_GL_SetSwapInterval(1);
+			}
+		}
+		else
+		{
+			SDL_GL_SetSwapInterval(0);
+		}
+	}
+
 	int app::width() const
 	{
 		return impl().width;