diff --git a/hgext/remotenames.py b/hgext/remotenames.py
index 4b4253b3ec0a772e0980b7bcac210680967f72ae_aGdleHQvcmVtb3RlbmFtZXMucHk=..27c8af87a0c95207793e62358ce5add1dbd80333_aGdleHQvcmVtb3RlbmFtZXMucHk= 100644
--- a/hgext/remotenames.py
+++ b/hgext/remotenames.py
@@ -137,7 +137,7 @@
     def __setitem__(self, k, v):
         raise NotImplementedError
 
-    def __delitem__(self):
+    def __delitem__(self, k):
         raise NotImplementedError
 
     def _fetchandcache(self, key):