diff --git a/include/svx/svdoopengl.hxx b/include/svx/svdoopengl.hxx
index 4bd4bc27aff4..68428da279c1 100644
--- a/include/svx/svdoopengl.hxx
+++ b/include/svx/svdoopengl.hxx
@@ -24,7 +24,7 @@ public:
 
     OpenGLContext& getOpenGLContext();
 
-    virtual void NbcResize(const Point& rRef, const Fraction& xFact, const Fraction& yFact);
+    virtual void NbcResize(const Point& rRef, const Fraction& xFact, const Fraction& yFact) SAL_OVERRIDE;
 
 private: