diff --git a/src/common/wincmn.cpp b/src/common/wincmn.cpp
index 0f7a0231e3..643db6adf5 100644
--- a/src/common/wincmn.cpp
+++ b/src/common/wincmn.cpp
@@ -1704,7 +1704,7 @@ void wxWindowBase::CaptureMouse()
     wxWindow *winOld = GetCapture();
     if ( winOld )
     {
-	winOld->DoReleaseMouse();
+	((wxWindowBase*) winOld)->DoReleaseMouse();
         // save it on stack
         wxWindowNext *item = new wxWindowNext;
         item->win = winOld;
@@ -1726,7 +1726,7 @@ void wxWindowBase::ReleaseMouse()
 
     if ( ms_winCaptureNext )
     {
-        ms_winCaptureNext->win->DoCaptureMouse();
+        ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
 
         wxWindowNext *item = ms_winCaptureNext;
         ms_winCaptureNext = item->next;