diff --git a/YACReader/goto_flow_gl.h b/YACReader/goto_flow_gl.h
index e5d07a5c..34ede703 100644
--- a/YACReader/goto_flow_gl.h
+++ b/YACReader/goto_flow_gl.h
@@ -24,7 +24,7 @@ public:
     void setNumSlides(unsigned int slides) override;
     void setImageReady(int index, const QByteArray &image) override;
 
-    void updateConfig(QSettings *settings);
+    void updateConfig(QSettings *settings) override;
     void setFlowRightToLeft(bool b) override;
 
 private: