diff --git a/hgext/largefiles/lfcommands.py b/hgext/largefiles/lfcommands.py
--- a/hgext/largefiles/lfcommands.py
+++ b/hgext/largefiles/lfcommands.py
@@ -443,6 +443,7 @@ def updatelfiles(ui, repo, filelist=None
         lfiles = set(lfutil.listlfiles(repo)) | set(lfdirstate)
 
         if filelist is not None:
+            filelist = set(filelist)
             lfiles = [f for f in lfiles if f in filelist]
 
         update = {}
@@ -512,6 +513,19 @@ def updatelfiles(ui, repo, filelist=None
 
             lfutil.synclfdirstate(repo, lfdirstate, lfile, normallookup)
 
+        if filelist is not None:
+            # If "local largefile" is chosen at file merging, it is
+            # not listed in "filelist" (= dirstate syncing is
+            # omitted), because the standin file is not changed before and
+            # after merging.
+            # But the status of such files may have to be changed by
+            # merging. For example, locally modified ("M") largefile
+            # has to become re-added("A"), if it is "normal" file in
+            # the target revision of linear-merging.
+            for lfile in lfdirstate:
+                if lfile not in filelist:
+                    lfutil.synclfdirstate(repo, lfdirstate, lfile, True)
+
         lfdirstate.write()
         if printmessage and lfiles:
             ui.status(_('%d largefiles updated, %d removed\n') % (updated,
diff --git a/tests/test-largefiles-update.t b/tests/test-largefiles-update.t
--- a/tests/test-largefiles-update.t
+++ b/tests/test-largefiles-update.t
@@ -247,6 +247,8 @@ Test a linear merge to a revision contai
   $ hg debugdirstate --nodates | grep large2
   a   0         -1 .hglf/large2
   r   0          0 large2
+  $ hg status -A large2
+  A large2
   $ cat large2
   modified large2 for linear merge
 
@@ -261,6 +263,8 @@ Test a linear merge to a revision contai
   $ hg debugdirstate --nodates | grep large3
   a   0         -1 .hglf/large3
   r   0          0 large3
+  $ hg status -A large3
+  A large3
   $ cat large3
   large3 as large file for linear merge