diff --git a/spectrum/src/frontends/slack/SlackRTM.h b/spectrum/src/frontends/slack/SlackRTM.h
index 66332d6d3f9a4df81f3c0610b457524100d7363d..8224749a9152bf92d254285b9247a4f9d206a07a 100644
--- a/spectrum/src/frontends/slack/SlackRTM.h
+++ b/spectrum/src/frontends/slack/SlackRTM.h
@@ -85,6 +85,7 @@ class SlackRTM {
 	private:
 		void handlePayloadReceived(const std::string &payload);
 		void handleRTMStart(HTTPRequest *req, bool ok, rapidjson::Document &resp, const std::string &data);
+		void handleWebSocketConnected();
 
 	private:
 		std::map<std::string, SlackChannelInfo> m_channels;