diff --git a/extensions/wallet/public/nsIWalletService.h b/extensions/wallet/public/nsIWalletService.h
index f60b662eb10b..9565854d3ef5 100644
--- a/extensions/wallet/public/nsIWalletService.h
+++ b/extensions/wallet/public/nsIWalletService.h
@@ -50,6 +50,9 @@ struct nsIWalletService : public nsISupports
     NS_IMETHOD WALLET_OKToCapture(PRBool* result, PRInt32 count, char* URLName) = 0;
 
     NS_IMETHOD SI_DisplaySignonInfoAsHTML()=0;
+#ifndef HTMLDialogs
+    NS_IMETHOD SI_SignonViewerReturn()=0;
+#endif
     NS_IMETHOD SI_RememberSignonData
         (char* URLName, char** name_array, char** value_array, char** type_array, PRInt32 value_cnt) = 0;
     NS_IMETHOD SI_RestoreSignonData