diff --git a/widget/src/windows/nsWindow.cpp b/widget/src/windows/nsWindow.cpp
index e2a33b1b445c..45325a1925b1 100644
--- a/widget/src/windows/nsWindow.cpp
+++ b/widget/src/windows/nsWindow.cpp
@@ -3838,7 +3838,7 @@ PRBool nsWindow::ProcessMessage(UINT msg, WPARAM &wParam, LPARAM &lParam,
 
     case WM_MOUSEMOVE:
     {
-#ifdef WINCE
+#ifdef WINCE_WINDOWS_MOBILE
       // Reset the kill timer so that we can continue at this
       // priority
       SetTimer(mWnd, KILL_PRIORITY_ID, 2000 /* 2seconds */, NULL);