diff --git a/include/Swiften/Server/ServerFromClientSession.h b/include/Swiften/Server/ServerFromClientSession.h
index 6483e3a0c823ecb0d076a1fe1ee4a8ddd2e7529e..7de233d309da89cc6179efed89ed89a6b93180d1 100644
--- a/include/Swiften/Server/ServerFromClientSession.h
+++ b/include/Swiften/Server/ServerFromClientSession.h
@@ -42,6 +42,7 @@ namespace Swift {
 			~ServerFromClientSession();
 
 			boost::signal<void ()> onSessionStarted;
+			boost::signal<void ()> onPasswordInvalid;
 			void setAllowSASLEXTERNAL();
 			const std::string &getUser() {
 				return user_;