diff --git a/hgext/largefiles/overrides.py b/hgext/largefiles/overrides.py
--- a/hgext/largefiles/overrides.py
+++ b/hgext/largefiles/overrides.py
@@ -1078,11 +1078,11 @@
         repo.lfstatus = False
 
 @eh.wrapfunction(cmdutil, 'forget')
-def cmdutilforget(orig, ui, repo, match, prefix, explicitonly, dryrun,
+def cmdutilforget(orig, ui, repo, match, prefix, uipathfn, explicitonly, dryrun,
                   interactive):
     normalmatcher = composenormalfilematcher(match, repo[None].manifest())
-    bad, forgot = orig(ui, repo, normalmatcher, prefix, explicitonly, dryrun,
-                       interactive)
+    bad, forgot = orig(ui, repo, normalmatcher, prefix, uipathfn, explicitonly,
+                       dryrun, interactive)
     m = composelargefilematcher(match, repo[None].manifest())
 
     try:
@@ -1098,12 +1098,12 @@
         fstandin = lfutil.standin(f)
         if fstandin not in repo.dirstate and not repo.wvfs.isdir(fstandin):
             ui.warn(_('not removing %s: file is already untracked\n')
-                    % m.rel(f))
+                    % uipathfn(f))
             bad.append(f)
 
     for f in forget:
         if ui.verbose or not m.exact(f):
-            ui.status(_('removing %s\n') % m.rel(f))
+            ui.status(_('removing %s\n') % uipathfn(f))
 
     # Need to lock because standin files are deleted then removed from the
     # repository and we could race in-between.
diff --git a/mercurial/cmdutil.py b/mercurial/cmdutil.py
--- a/mercurial/cmdutil.py
+++ b/mercurial/cmdutil.py
@@ -2084,7 +2084,8 @@
         for subpath in ctx.substate:
             ctx.sub(subpath).addwebdirpath(serverpath, webconf)
 
-def forget(ui, repo, match, prefix, explicitonly, dryrun, interactive):
+def forget(ui, repo, match, prefix, uipathfn, explicitonly, dryrun,
+           interactive):
     if dryrun and interactive:
         raise error.Abort(_("cannot specify both --dry-run and --interactive"))
     bad = []
@@ -2101,14 +2102,16 @@
         sub = wctx.sub(subpath)
         submatch = matchmod.subdirmatcher(subpath, match)
         subprefix = repo.wvfs.reljoin(prefix, subpath)
+        subuipathfn = scmutil.subdiruipathfn(subpath, uipathfn)
         try:
-            subbad, subforgot = sub.forget(submatch, subprefix, dryrun=dryrun,
+            subbad, subforgot = sub.forget(submatch, subprefix, subuipathfn,
+                                           dryrun=dryrun,
                                            interactive=interactive)
             bad.extend([subpath + '/' + f for f in subbad])
             forgot.extend([subpath + '/' + f for f in subforgot])
         except error.LookupError:
             ui.status(_("skipping missing subrepository: %s\n")
-                           % match.rel(subpath))
+                           % uipathfn(subpath))
 
     if not explicitonly:
         for f in match.files():
@@ -2123,7 +2126,7 @@
                             continue
                         ui.warn(_('not removing %s: '
                                   'file is already untracked\n')
-                                % match.rel(f))
+                                % uipathfn(f))
                     bad.append(f)
 
     if interactive:
@@ -2154,7 +2157,7 @@
 
     for f in forget:
         if ui.verbose or not match.exact(f) or interactive:
-            ui.status(_('removing %s\n') % match.rel(f),
+            ui.status(_('removing %s\n') % uipathfn(f),
                       label='ui.addremove.removed')
 
     if not dryrun:
diff --git a/mercurial/commands.py b/mercurial/commands.py
--- a/mercurial/commands.py
+++ b/mercurial/commands.py
@@ -2258,7 +2258,8 @@
 
     m = scmutil.match(repo[None], pats, opts)
     dryrun, interactive = opts.get('dry_run'), opts.get('interactive')
-    rejected = cmdutil.forget(ui, repo, m, prefix="",
+    uipathfn = scmutil.getuipathfn(repo, forcerelativevalue=True)
+    rejected = cmdutil.forget(ui, repo, m, prefix="", uipathfn=uipathfn,
                               explicitonly=False, dryrun=dryrun,
                               interactive=interactive)[0]
     return rejected and 1 or 0
diff --git a/mercurial/subrepo.py b/mercurial/subrepo.py
--- a/mercurial/subrepo.py
+++ b/mercurial/subrepo.py
@@ -355,7 +355,7 @@
         matched by the match function
         '''
 
-    def forget(self, match, prefix, dryrun, interactive):
+    def forget(self, match, prefix, uipathfn, dryrun, interactive):
         return ([], [])
 
     def removefiles(self, matcher, prefix, uipathfn, after, force, subrepos,
@@ -836,8 +836,8 @@
         return ctx.walk(match)
 
     @annotatesubrepoerror
-    def forget(self, match, prefix, dryrun, interactive):
-        return cmdutil.forget(self.ui, self._repo, match, prefix,
+    def forget(self, match, prefix, uipathfn, dryrun, interactive):
+        return cmdutil.forget(self.ui, self._repo, match, prefix, uipathfn,
                               True, dryrun=dryrun, interactive=interactive)
 
     @annotatesubrepoerror