diff --git a/build/wince/shunt/win32.cpp b/build/wince/shunt/win32.cpp
index 238f26aeb05c..8f86d544d6fb 100755
--- a/build/wince/shunt/win32.cpp
+++ b/build/wince/shunt/win32.cpp
@@ -1194,6 +1194,15 @@ MOZCE_SHUNT_API DWORD SetNamedSecurityInfoW(unsigned short* pObjectName,
 
 
 
+MOZCE_SHUNT_API void FatalAppExitW(UINT uAction, LPCWSTR lpMessageText)
+{
+  if ( ::MessageBoxW(NULL, lpMessageText, L"Runtime Error", MB_OKCANCEL | MB_ICONERROR) == IDCANCEL )
+    return;
+
+  exit(-1);
+}
+
+
 #if 0
 {
 #endif