diff --git a/runtime/ftplugin/modula3.vim b/runtime/ftplugin/modula3.vim
index 1f8ab35..45dd7ca 100644
--- a/runtime/ftplugin/modula3.vim
+++ b/runtime/ftplugin/modula3.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	Modula-3
 " Maintainer:	Doug Kearns <dougkearns@gmail.com>
-" Last Change:	2022 June 12 
+" Last Change:	2024 Jan 14
 
 if exists("b:did_ftplugin")
   finish
@@ -31,8 +31,12 @@
 endif
 
 if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
-  let b:browsefilter = "Modula-3 Source Files (*.m3)\t*.m3\n" ..
-		     \ "All Files (*.*)\t*.*\n"
+  let b:browsefilter = "Modula-3 Source Files (*.m3, *.i3, *.mg, *ig)\t*.m3;*.i3;*.mg;*.ig\n"
+  if has("win32")
+    let b:browsefilter ..= "All Files (*.*)\t*\n"
+  else
+    let b:browsefilter ..= "All Files (*)\t*\n"
+  endif
   let b:undo_ftplugin ..= " | unlet! b:browsefilter"
 endif