diff --git a/lib/multi-user-chat.js b/lib/multi-user-chat.js
index e53aeaa..f6585a9 100644
--- a/lib/multi-user-chat.js
+++ b/lib/multi-user-chat.js
@@ -349,7 +349,7 @@ MultiUserChat.prototype.getRole = function(data, callback) {
         if (!callback) return self.manager._getLogger().error('No callback provided')
         if (stanza.attrs.type === 'error')
             return callback(self._parseError(stanza), null)
-        var items = stanza.getChild('query', this.NS_ADMIN)
+        var items = stanza.getChild('query', self.NS_ADMIN)
             .getChildren('item')
         var results = []
         items.forEach(function(item) {