diff --git a/mozilla/cmd/xfe/src/xfe2_extern.h b/mozilla/cmd/xfe/src/xfe2_extern.h
index 49f9011c1ab..0fa2a0e511d 100644
--- a/mozilla/cmd/xfe/src/xfe2_extern.h
+++ b/mozilla/cmd/xfe/src/xfe2_extern.h
@@ -122,8 +122,10 @@ extern void XFE_SetDocTitle(MWContext *context, char *title);
 
 extern void fe_openTargetUrl(MWContext * context,LO_AnchorData * anchor_data);
 
+#if defined(MOZ_MAIL_NEWS)
 extern MSG_IMAPUpgradeType fe_promptForIMAPSubscriptionUpgrade(MWContext *context,
                                                                const char* hostName);
+#endif
 
 XP_END_PROTOS