diff --git a/contrib/perf.py b/contrib/perf.py
--- a/contrib/perf.py
+++ b/contrib/perf.py
@@ -423,7 +423,8 @@
         oldquiet = repo.ui.quiet
         repo.ui.quiet = True
         matcher = scmutil.match(repo[None])
-        timer(lambda: scmutil.addremove(repo, matcher, "", dry_run=True))
+        timer(lambda: scmutil.addremove(repo, matcher, "",
+                                        opts['dry_run']=True))
     finally:
         repo.ui.quiet = oldquiet
         fm.end()
diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -1214,12 +1214,11 @@
     finally:
         repo.lfstatus = False
 
-def scmutiladdremove(orig, repo, matcher, prefix, opts=None, dry_run=None,
-                     similarity=None):
+def scmutiladdremove(orig, repo, matcher, prefix, opts=None):
     if opts is None:
         opts = {}
     if not lfutil.islfilesrepo(repo):
-        return orig(repo, matcher, prefix, opts, dry_run, similarity)
+        return orig(repo, matcher, prefix, opts)
     # Get the list of missing largefiles so we can remove them
     lfdirstate = lfutil.openlfdirstate(repo.ui, repo)
     unsure, s = lfdirstate.status(matchmod.always(repo.root, repo.getcwd()),
@@ -1250,7 +1249,7 @@
     # function to take care of the rest.  Make sure it doesn't do anything with
     # largefiles by passing a matcher that will ignore them.
     matcher = composenormalfilematcher(matcher, repo[None].manifest(), added)
-    return orig(repo, matcher, prefix, opts, dry_run, similarity)
+    return orig(repo, matcher, prefix, opts)
 
 # Calling purge with --all will cause the largefiles to be deleted.
 # Override repo.status to prevent this from happening.
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -253,8 +253,9 @@
         raise error.Abort(_('similarity must be a number'))
     if sim < 0 or sim > 100:
         raise error.Abort(_('similarity must be between 0 and 100'))
+    opts['similarity'] = sim / 100.0
     matcher = scmutil.match(repo[None], pats, opts)
-    return scmutil.addremove(repo, matcher, "", opts, similarity=sim / 100.0)
+    return scmutil.addremove(repo, matcher, "", opts)
 
 @command('^annotate|blame',
     [('r', 'rev', '', _('annotate the specified revision'), _('REV')),
diff --git a/mercurial/scmutil.py b/mercurial/scmutil.py
--- a/mercurial/scmutil.py
+++ b/mercurial/scmutil.py
@@ -731,14 +731,12 @@
             if tostrip:
                 repair.delayedstrip(repo.ui, repo, tostrip, operation)
 
-def addremove(repo, matcher, prefix, opts=None, dry_run=None, similarity=None):
+def addremove(repo, matcher, prefix, opts=None):
     if opts is None:
         opts = {}
     m = matcher
-    if dry_run is None:
-        dry_run = opts.get('dry_run')
-    if similarity is None:
-        similarity = float(opts.get('similarity') or 0)
+    dry_run = opts.get('dry_run')
+    similarity = float(opts.get('similarity') or 0)
 
     ret = 0
     join = lambda f: os.path.join(prefix, f)
@@ -749,7 +747,7 @@
         if opts.get('subrepos') or m.exact(subpath) or any(submatch.files()):
             sub = wctx.sub(subpath)
             try:
-                if sub.addremove(submatch, prefix, opts, dry_run, similarity):
+                if sub.addremove(submatch, prefix, opts):
                     ret = 1
             except error.LookupError:
                 repo.ui.status(_("skipping missing subrepository: %s\n")
diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -287,7 +287,7 @@
     def add(self, ui, match, prefix, explicitonly, **opts):
         return []
 
-    def addremove(self, matcher, prefix, opts, dry_run, similarity):
+    def addremove(self, matcher, prefix, opts):
         self.ui.warn("%s: %s" % (prefix, _("addremove is not supported")))
         return 1
 
@@ -510,15 +510,14 @@
                            explicitonly, **opts)
 
     @annotatesubrepoerror
-    def addremove(self, m, prefix, opts, dry_run, similarity):
+    def addremove(self, m, prefix, opts):
         # In the same way as sub directories are processed, once in a subrepo,
         # always entry any of its subrepos.  Don't corrupt the options that will
         # be used to process sibling subrepos however.
         opts = copy.copy(opts)
         opts['subrepos'] = True
         return scmutil.addremove(self._repo, m,
-                                 self.wvfs.reljoin(prefix, self._path), opts,
-                                 dry_run, similarity)
+                                 self.wvfs.reljoin(prefix, self._path), opts)
 
     @annotatesubrepoerror
     def cat(self, match, fm, fntemplate, prefix, **opts):