diff --git a/src/gtk/window.cpp b/src/gtk/window.cpp
index e85cc90c77..9ace53a97c 100644
--- a/src/gtk/window.cpp
+++ b/src/gtk/window.cpp
@@ -1105,7 +1105,7 @@ gtk_window_key_press_callback( GtkWidget *WXUNUSED(widget),
 
                 break;
             }
-            if (ancestor->IsTopLevel())
+            if (ancestor->IsTopNavigationDomain())
                 break;
             ancestor = ancestor->GetParent();
         }
diff --git a/src/msw/evtloop.cpp b/src/msw/evtloop.cpp
index 1d5ccc7737..cb2bae0d5f 100644
--- a/src/msw/evtloop.cpp
+++ b/src/msw/evtloop.cpp
@@ -137,7 +137,7 @@ bool wxGUIEventLoop::PreProcessMessage(WXMSG *msg)
         // stop at first top level window, i.e. don't try to process the key
         // strokes originating in a dialog using the accelerators of the parent
         // frame - this doesn't make much sense
-        if ( wnd->IsTopLevel() )
+        if ( wnd->IsTopNavigationDomain() )
             break;
     }
 
@@ -151,7 +151,7 @@ bool wxGUIEventLoop::PreProcessMessage(WXMSG *msg)
         // if we don't do this, pressing ESC on a modal dialog shown as child
         // of a modal dialog with wxID_CANCEL will cause the parent dialog to
         // be closed, for example
-        if ( wnd->IsTopLevel() )
+        if ( wnd->IsTopNavigationDomain() )
             break;
     }
 
diff --git a/src/osx/window_osx.cpp b/src/osx/window_osx.cpp
index 67a96cce70..4e027720e7 100644
--- a/src/osx/window_osx.cpp
+++ b/src/osx/window_osx.cpp
@@ -2761,7 +2761,7 @@ bool wxWindowMac::OSXHandleKeyEvent( wxKeyEvent& event )
                 break;
             }
 
-            if (ancestor->IsTopLevel())
+            if (ancestor->IsTopNavigationDomain())
                 break;
 
             ancestor = ancestor->GetParent();