diff --git a/include/wx/osx/webview_webkit.h b/include/wx/osx/webview_webkit.h
index 311aff84d8..5f49b43706 100644
--- a/include/wx/osx/webview_webkit.h
+++ b/include/wx/osx/webview_webkit.h
@@ -24,6 +24,9 @@
 // Web Kit Control
 // ----------------------------------------------------------------------------
 
+class wxMacControl;
+class wxWidgetCocoaImpl;
+
 class WXDLLIMPEXP_WEB wxWebViewWebKit : public wxWebView
 {
 public: