diff --git a/interface/wx/propgrid/manager.h b/interface/wx/propgrid/manager.h
index 77b2784423..4d9ed996e2 100644
--- a/interface/wx/propgrid/manager.h
+++ b/interface/wx/propgrid/manager.h
@@ -420,11 +420,6 @@ public:
     */
     bool IsAnyModified() const;
 
-    /**
-        Returns @true if updating is frozen (i.e. Freeze() called but not yet Thaw() ).
-    */
-    bool IsFrozen() const;
-
     /**
         Returns @true if any property on given page has been modified by the user.
     */