diff --git a/include/transport/networkpluginserver.h b/include/transport/networkpluginserver.h
index b0d742b817cfec243b9029b738a9a707e9982638..563d708080a0a5b2c499cbd0e49d2f8b032b796b 100644
--- a/include/transport/networkpluginserver.h
+++ b/include/transport/networkpluginserver.h
@@ -100,6 +100,7 @@ class NetworkPluginServer {
 		void handleBuddyChangedPayload(const std::string &payload);
 		void handleBuddyRemovedPayload(const std::string &payload);
 		void handleConvMessagePayload(const std::string &payload, bool subject = false);
+		void handleConvMessageAckPayload(const std::string &payload);
 		void handleParticipantChangedPayload(const std::string &payload);
 		void handleRoomChangedPayload(const std::string &payload);
 		void handleVCardPayload(const std::string &payload);