diff --git a/include/wx/generic/grid.h b/include/wx/generic/grid.h
index 935180d8cf..bc8d9b2a50 100644
--- a/include/wx/generic/grid.h
+++ b/include/wx/generic/grid.h
@@ -3003,7 +3003,6 @@ private:
     void DoGridProcessTab(wxKeyboardState& kbdState);
 
     // common implementations of methods defined for both rows and columns
-    bool DoEndDragResizeLine(const wxGridOperations& oper, wxGridWindow *gridWindow);
     int PosToLinePos(int pos, bool clipToMinMax,
                      const wxGridOperations& oper,
                      wxGridWindow *gridWindow) const;