diff --git a/src/osx/webview_webkit.mm b/src/osx/webview_webkit.mm
index 598f63391e..883fba00f2 100644
--- a/src/osx/webview_webkit.mm
+++ b/src/osx/webview_webkit.mm
@@ -694,7 +694,7 @@ void wxWebViewWebKit::OnSize(wxSizeEvent &event)
     // we want is the root view, because we need to make the y origin relative
     // to the very top of the window, not its contents, since we later flip
     // the y coordinate for Cocoa.
-    HIViewConvertRect (&rect, m_peer->GetControlRef(),
+    HIViewConvertRect (&rect, GetPeer()->GetControlRef(),
                                 HIViewGetRoot(
                                     (WindowRef) MacGetTopLevelWindowRef()
                                  ));