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-rw-r--r--backends/graphics/opengl/opengl-graphics.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/backends/graphics/opengl/opengl-graphics.h b/backends/graphics/opengl/opengl-graphics.h
index d2d0358407..93c0c5bc83 100644
--- a/backends/graphics/opengl/opengl-graphics.h
+++ b/backends/graphics/opengl/opengl-graphics.h
@@ -47,7 +47,7 @@ enum {
GFX_NEAREST = 1
};
-class OpenGLGraphicsManager : public GraphicsManager {
+class OpenGLGraphicsManager : virtual public GraphicsManager {
public:
OpenGLGraphicsManager();
virtual ~OpenGLGraphicsManager();