diff --git a/xmpp/src/muc/room.rs b/xmpp/src/muc/room.rs
index 493dfe7fd1226bdd500ac61a5a86012e27816127..2d50b24a7aa5662113ca7c898c8d7262ddbab7e8 100644
--- a/xmpp/src/muc/room.rs
+++ b/xmpp/src/muc/room.rs
@@ -64,7 +64,7 @@ pub async fn join_room<'a>(agent: &mut Agent, settings: JoinRoomSettings<'a>) {
         return;
     }
 
-    if !agent.rooms_joined.contains_key(&room) {
+    if agent.rooms_joined.contains_key(&room) {
         // We are already joined, cannot join
         warn!("Requesting to join room {room} which is already joined...");
         return;