--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -1768,21 +1768,23 @@ NS_IMETHODIMP nsWindow::SetSizeMode(PRIn
   nsresult rv;
 
   // Let's not try and do anything if we're already in that state.
   // (This is needed to prevent problems when calling window.minimize(), which
   // calls us directly, and then the OS triggers another call to us.)
   if (aMode == mSizeMode)
     return NS_OK;
 
+#ifdef WINCE
   // on windows mobile, dialogs and top level windows are full screen
   // This is partly due to the lack of a GetWindowPlacement.
   if (mWindowType == eWindowType_dialog || mWindowType == eWindowType_toplevel) {
     aMode = nsSizeMode_Maximized;
   }
+#endif
 
   // save the requested state
   rv = nsBaseWidget::SetSizeMode(aMode);
   if (NS_SUCCEEDED(rv) && mIsVisible) {
     int mode;
 
     switch (aMode) {
       case nsSizeMode_Maximized :