diff --git a/pubsub/strophe.pubsub.js b/pubsub/strophe.pubsub.js
index 330e9cc..45acad6 100644
--- a/pubsub/strophe.pubsub.js
+++ b/pubsub/strophe.pubsub.js
@@ -548,7 +548,7 @@ Extend connection object to have plugin name 'pubsub'.
      */
     setAffiliation: function(node, jid, affiliation, call_back) {
         var that = this._connection;
-        var iqid = thiat.getUniqueId("pubsubaffiliations");
+        var iqid = that.getUniqueId("pubsubaffiliations");
 
         var iq = $iq({from:this.jid, to:this.service, type:'set', id:iqid})
           .c('pubsub', {'xmlns':Strophe.NS.PUBSUB_OWNER})