diff --git a/src/plugins/plugin_xep_0249.py b/src/plugins/plugin_xep_0249.py
index b12f4c40..0aecd4f8 100755
--- a/src/plugins/plugin_xep_0249.py
+++ b/src/plugins/plugin_xep_0249.py
@@ -137,8 +137,11 @@ class XEP_0249(object):
         except:
             error(_('Error while parsing invitation'))
             return
-        autojoin = self.host.memory.getParamA(AUTOJOIN_NAME, AUTOJOIN_KEY, profile_key=profile)
         from_ = message["from"]
+        if room in self.host.plugins["XEP-0045"].clients[profile].joined_rooms:
+            info(_("Invitation silently discarded because user is already in the room."))
+            return
+        autojoin = self.host.memory.getParamA(AUTOJOIN_NAME, AUTOJOIN_KEY, profile_key=profile)
 
         def accept_cb(conf_id, accepted, data, profile):
             if conf_id == room and accepted: