diff --git a/README.md b/README.md
index 661a708..0b8d0e5 100644
--- a/README.md
+++ b/README.md
@@ -233,8 +233,7 @@ require("oil").setup({
       { "name", "asc" },
     },
     -- Customize the highlight group for the file name
-    highlight_filename = function(entry, is_hidden, is_link_target, is_link_orphan,
-      bufnr)
+    highlight_filename = function(entry, is_hidden, is_link_target, is_link_orphan)
       return nil
     end,
   },
diff --git a/doc/oil.txt b/doc/oil.txt
index 6f84dd1..8540cbd 100644
--- a/doc/oil.txt
+++ b/doc/oil.txt
@@ -118,7 +118,7 @@ CONFIG                                                                *oil-confi
           { "name", "asc" },
         },
         -- Customize the highlight group for the file name
-        highlight_filename = function(entry, is_hidden, is_link_target, is_link_orphan, bufnr)
+        highlight_filename = function(entry, is_hidden, is_link_target, is_link_orphan)
           return nil
         end,
       },