diff --git a/spectrum/src/frontends/slack/SlackSession.cpp b/spectrum/src/frontends/slack/SlackSession.cpp
index 11a1fa7e0e77543cca041c2b37fa89921e10824f..7f961acaef2c468d16bbd3f13c914ef647f14aef 100644
--- a/spectrum/src/frontends/slack/SlackSession.cpp
+++ b/spectrum/src/frontends/slack/SlackSession.cpp
@@ -125,7 +125,7 @@ void SlackSession::sendMessage(boost::shared_ptr<Swift::Message> message) {
 			return;
 		}
 		channel = m_slackChannel;
-		from = Buddy::JIDToLegacyName(message->getFrom());
+		from = Buddy::JIDToLegacyName(message->getFrom(), m_user);
 
 		Buddy *b;
 		if (m_user && (b = m_user->getRosterManager()->getBuddy(from)) != NULL) {