diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index b7f89b18bd..7e6640eb42 100644
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -2267,7 +2267,7 @@ bool wxWindowMSW::MSWProcessMessage(WXMSG* pMsg)
         // relay mouse move events to the tooltip control
         MSG *msg = (MSG *)pMsg;
         if ( msg->message == WM_MOUSEMOVE )
-            m_tooltip->RelayEvent(pMsg);
+            wxToolTip::RelayEvent(pMsg);
     }
 #endif // wxUSE_TOOLTIPS