diff --git a/xpfe/components/startup/public/nsISplashScreen.h b/xpfe/components/startup/public/nsISplashScreen.h
index 204d20686136..86c386c93342 100644
--- a/xpfe/components/startup/public/nsISplashScreen.h
+++ b/xpfe/components/startup/public/nsISplashScreen.h
@@ -64,9 +64,11 @@
  */
 class nsISplashScreen : public nsISupports {
 public:
-    NS_DEFINE_STATIC_IID_ACCESSOR( NS_ISPLASHSCREEN_IID )
+    NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISPLASHSCREEN_IID)
     NS_IMETHOD Show() = 0;
     NS_IMETHOD Hide() = 0;
 }; // class nsISplashScreen
 
+NS_DECLARE_STATIC_IID_ACCESSOR(nsISplashScreen, NS_ISPLASHSCREEN_IID)
+
 #endif // nsISplashScreen_h__