diff --git a/ipapython/ipaldap.py b/ipapython/ipaldap.py
index 74add512a..9fb7fd3f5 100644
--- a/ipapython/ipaldap.py
+++ b/ipapython/ipaldap.py
@@ -456,7 +456,7 @@ class LDAPEntry(collections.MutableMapping):
     def __delitem__(self, name):
         name = self._get_attr_name(name)
 
-        for (altname, keyname) in self._names.items():
+        for (altname, keyname) in list(self._names.items()):
             if keyname == name:
                 del self._names[altname]