diff --git a/spectrum/src/frontends/slack/SlackFrontend.h b/spectrum/src/frontends/slack/SlackFrontend.h
index f0f4f30f6ef16def15fc5b8e0a64ac3ab2b847f6..622047a27cccd55cb528dc15e0e902d47c00d4b3 100644
--- a/spectrum/src/frontends/slack/SlackFrontend.h
+++ b/spectrum/src/frontends/slack/SlackFrontend.h
@@ -68,7 +68,6 @@ namespace Transport {
 			virtual std::string setOAuth2Code(const std::string &code, const std::string &state);
 			virtual std::string getOAuth2URL(const std::vector<std::string> &args);
 			virtual std::string getRegistrationFields();
-			virtual bool handleAdminMessage(Swift::Message::ref message);
 		
 			void handleMessage(boost::shared_ptr<Swift::Message> message);