diff --git a/Source/Core/VideoBackends/OGL/OGLRender.h b/Source/Core/VideoBackends/OGL/OGLRender.h
@@ -128,6 +128,7 @@ class Renderer : public ::Renderer
 
   u16 BBoxReadImpl(int index) override;
   void BBoxWriteImpl(int index, u16 value) override;
+  void BBoxFlushImpl() override;
 
   void BeginUtilityDrawing() override;
   void EndUtilityDrawing() override;