diff --git a/sleekxmpp/plugins/xep_0118/user_tune.py b/sleekxmpp/plugins/xep_0118/user_tune.py
index d36466d6..e3ffc2e4 100644
--- a/sleekxmpp/plugins/xep_0118/user_tune.py
+++ b/sleekxmpp/plugins/xep_0118/user_tune.py
@@ -25,7 +25,7 @@ class xep_0118(base_plugin):
     """
 
     def plugin_init(self):
-        self.xep = '118'
+        self.xep = '0118'
         self.description = 'User Tune'
         self.stanza = stanza
 
diff --git a/sleekxmpp/plugins/xep_0163.py b/sleekxmpp/plugins/xep_0163.py
index 79bdc4cd..e66b38fd 100644
--- a/sleekxmpp/plugins/xep_0163.py
+++ b/sleekxmpp/plugins/xep_0163.py
@@ -21,7 +21,7 @@ class xep_0163(base_plugin):
     """
 
     def plugin_init(self):
-        self.xep = '163'
+        self.xep = '0163'
         self.description = 'Personal Eventing Protocol'
 
     def add_interest(self, namespace, jid=None):