diff --git a/code/sdl/sdl_glimp.c b/code/sdl/sdl_glimp.c
index 1f12fb72..df201686 100644
--- a/code/sdl/sdl_glimp.c
+++ b/code/sdl/sdl_glimp.c
@@ -462,6 +462,10 @@ static int GLimp_SetMode(int mode, qboolean fullscreen, qboolean noborder)
 			continue;
 		}
 
+		qglClearColor( 0, 0, 0, 1 );
+		qglClear( GL_COLOR_BUFFER_BIT );
+		SDL_GL_SwapWindow( SDL_window );
+
 		SDL_GL_SetSwapInterval( r_swapInterval->integer );
 
 		glConfig.colorBits = testColorBits;