diff --git a/src/gui/painting/qcolortransform_p.h b/src/gui/painting/qcolortransform_p.h
index 99c09188cbe..e5be45bb207 100644
--- a/src/gui/painting/qcolortransform_p.h
+++ b/src/gui/painting/qcolortransform_p.h
@@ -35,7 +35,6 @@ public:
 
     void updateLutsIn() const;
     void updateLutsOut() const;
-    bool simpleGammaCorrection() const;
     bool isIdentity() const;
 
     Q_GUI_EXPORT void prepare();