diff --git a/interface/wx/gdicmn.h b/interface/wx/gdicmn.h
index 9305d54a31..f5bacacbce 100644
--- a/interface/wx/gdicmn.h
+++ b/interface/wx/gdicmn.h
@@ -233,6 +233,8 @@ public:
     wxRealPoint& operator /=(int divisor);
     wxRealPoint& operator *=(int factor);
 
+    wxRealPoint operator *(const wxRealPoint& pt, double factor);
+    wxRealPoint operator *(double factor, const wxRealPoint& pt);
     wxRealPoint operator /(const wxRealPoint& pt, double divisor);
     ///@}
 
@@ -733,6 +735,8 @@ public:
     wxPoint& operator +=(const wxSize& sz);
     wxPoint& operator -=(const wxSize& sz);
 
+    wxPoint operator -(const wxPoint& pt);
+
     wxPoint operator /(const wxPoint& sz, int divisor);
     wxPoint operator *(const wxPoint& sz, int factor);
     wxPoint operator *(int factor, const wxPoint& sz);
@@ -740,6 +744,8 @@ public:
     wxPoint& operator *=(int factor);
 
     wxPoint operator /(const wxPoint& pt, double divisor);
+    wxPoint operator *(const wxPoint& pt, double factor);
+    wxPoint operator *(double factor, const wxPoint& pt);
     ///@}