diff --git a/src/nvim/bufwrite.c b/src/nvim/bufwrite.c
index 62c72ace3e..cf248ebd52 100644
--- a/src/nvim/bufwrite.c
+++ b/src/nvim/bufwrite.c
@@ -743,7 +743,7 @@ static int buf_write_make_backup(char *fname, bool append, FileInfo *file_info_o
         || !os_fileinfo_id_equal(&file_info, file_info_old)) {
       *backup_copyp = true;
     } else {
-      // Check if we can create a file and set the owner/group to
+      // Check if we can create a file and set the owner/group/mode to
       // the ones from the original file.
       // First find a file name that doesn't exist yet (use some
       // arbitrary numbers).
@@ -764,6 +764,7 @@ static int buf_write_make_backup(char *fname, bool append, FileInfo *file_info_o
       } else {
 #ifdef UNIX
         os_fchown(fd, (uv_uid_t)file_info_old->stat.st_uid, (uv_gid_t)file_info_old->stat.st_gid);
+        os_fsetperm(fd, perm);
         if (!os_fileinfo(tmp_fname, &file_info)
             || file_info.stat.st_uid != file_info_old->stat.st_uid
             || file_info.stat.st_gid != file_info_old->stat.st_gid
diff --git a/src/nvim/os/fs.c b/src/nvim/os/fs.c
index 820e5cdc3d..bceb4a867b 100644
--- a/src/nvim/os/fs.c
+++ b/src/nvim/os/fs.c
@@ -804,6 +804,16 @@ int os_setperm(const char *const name, int perm)
   return (r == kLibuvSuccess ? OK : FAIL);
 }
 
+/// Set the permission of the file referred to by the open file descriptor.
+///
+/// @return `OK` for success, `FAIL` for failure.
+int os_fsetperm(int fd, int perm)
+{
+  int r;
+  RUN_UV_FS_FUNC(r, uv_fs_fchmod, fd, perm, NULL);
+  return (r == kLibuvSuccess ? OK : FAIL);
+}
+
 #ifdef HAVE_XATTR
 /// Copy extended attributes from_file to to_file
 void os_copy_xattr(const char *from_file, const char *to_file)
diff --git a/test/old/testdir/test_writefile.vim b/test/old/testdir/test_writefile.vim
index ad5abd9b9f..4b28703046 100644
--- a/test/old/testdir/test_writefile.vim
+++ b/test/old/testdir/test_writefile.vim
@@ -1013,4 +1013,24 @@ func Test_write_with_xattr_support()
   bw!
 endfunc
 
+func Test_backupcopy_auto_restrictive_umask()
+  CheckUnix
+  call writefile(['FOO'], 'Xumaskfile', 'D')
+  call setfperm('Xumaskfile', 'rw-r--r--')
+  let inode_before = systemlist('ls -i Xumaskfile')[0]->matchstr('^\s*\zs\d\+')
+  call writefile([
+	\ 'set backupcopy=auto writebackup nobackup backupskip=',
+	\ 'edit Xumaskfile',
+	\ 'call setline(1, ["BAR"])',
+	\ 'write',
+	\ 'qall!'
+	\ ], 'Xumaskscript', 'D')
+  call system('umask 0077; ' .. GetVimCommand() .. ' -i NONE -n -S Xumaskscript')
+  call assert_equal(0, v:shell_error)
+  call assert_equal(['BAR'], readfile('Xumaskfile'))
+  call assert_equal('rw-r--r--', getfperm('Xumaskfile'))
+  call assert_notequal(inode_before,
+	\ systemlist('ls -i Xumaskfile')[0]->matchstr('^\s*\zs\d\+'))
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab