diff --git a/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs b/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
index 1ae8375289..1fa8cfd985 100644
--- a/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
+++ b/OpenRA.Renderer.Sdl2/Sdl2GraphicsDevice.cs
@@ -226,7 +226,7 @@ namespace OpenRA.Renderer.Sdl2
 
 		public void Clear()
 		{
-			GL.ClearColor(0, 0, 0, 0);
+			GL.ClearColor(0, 0, 0, 1);
 			ErrorHandler.CheckGlError();
 			GL.Clear(ClearBufferMask.ColorBufferBit);
 			ErrorHandler.CheckGlError();