diff --git a/include/transport/factory.h b/include/transport/factory.h
index 85b7f37a11d010098fd7bd512619eb25cc4ae37e..0c4595d734d29ac6a2e86771ff50fb30711bd410 100644
--- a/include/transport/factory.h
+++ b/include/transport/factory.h
@@ -40,7 +40,7 @@ class RosterManager;
 class Factory {
 	public:
 		
-		virtual Conversation *createConversation(ConversationManager *conversationManager, const std::string &legacyName) = 0;
+		virtual Conversation *createConversation(ConversationManager *conversationManager, const std::string &legacyName, bool isMuc = false) = 0;
 
 		virtual Buddy *createBuddy(RosterManager *rosterManager, const BuddyInfo &buddyInfo) = 0;
 };