--- a/hgext/largefiles/overrides.py	Thu Sep 24 00:48:24 2015 -0700
+++ b/hgext/largefiles/overrides.py	Thu Sep 24 00:49:02 2015 -0700
@@ -1172,8 +1172,10 @@
     finally:
         repo.lfstatus = False
 
-def scmutiladdremove(orig, repo, matcher, prefix, opts={}, dry_run=None,
+def scmutiladdremove(orig, repo, matcher, prefix, opts=None, dry_run=None,
                      similarity=None):
+    if opts is None:
+        opts = {}
     if not lfutil.islfilesrepo(repo):
         return orig(repo, matcher, prefix, opts, dry_run, similarity)
     # Get the list of missing largefiles so we can remove them