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-rw-r--r--backends/sdl/sdl_gl.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/backends/sdl/sdl_gl.cpp b/backends/sdl/sdl_gl.cpp
index e58ce505e1..cc307eae58 100644
--- a/backends/sdl/sdl_gl.cpp
+++ b/backends/sdl/sdl_gl.cpp
@@ -94,7 +94,7 @@ void OSystem_SDL_OpenGL::load_gfx_mode() {
Amask = 0;
_forceFull = true;
- _mode_flags = DF_UPDATE_EXPAND_1_PIXEL;
+ _mode_flags |= DF_UPDATE_EXPAND_1_PIXEL;
_tmpscreen = NULL;
_tmpScreenWidth = (_screenWidth + 3);