diff --git a/src/slic3r/GUI/Notebook.hpp b/src/slic3r/GUI/Notebook.hpp
index ff5020b9c4..af03a6a080 100644
--- a/src/slic3r/GUI/Notebook.hpp
+++ b/src/slic3r/GUI/Notebook.hpp
@@ -245,7 +245,7 @@ public:
         GetBtnsListCtrl()->Rescale();
     }
 
-    void Notebook::OnNavigationKey(wxNavigationKeyEvent& event)
+    void OnNavigationKey(wxNavigationKeyEvent& event)
     {
         if (event.IsWindowChange()) {
             // change pages