diff --git a/runtime/ftplugin/occam.vim b/runtime/ftplugin/occam.vim
index e9b7c01..0eb510f 100644
--- a/runtime/ftplugin/occam.vim
+++ b/runtime/ftplugin/occam.vim
@@ -3,6 +3,7 @@
 " Copyright:	Christian Jacobsen <clj3@kent.ac.uk>, Mario Schweigler <ms44@kent.ac.uk>
 " Maintainer:	Mario Schweigler <ms44@kent.ac.uk>
 " Last Change:	23 April 2003
+"		2024 Jan 14 by Vim Project (browsefilter)
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -30,19 +31,23 @@
 "}}}
 
 "{{{  File browsing filters
-" Win32 can filter files in the browse dialog
-if has("gui_win32") && !exists("b:browsefilter")
-  let b:browsefilter = "All Occam Files (*.occ *.inc)\t*.occ;*.inc\n" .
+" Win32 and GTK can filter files in the browse dialog
+if (has("gui_win32") || has("gui_gtk")) && !exists("b:browsefilter")
+  let b:browsefilter = "All Occam Files (*.occ, *.inc)\t*.occ;*.inc\n" .
 	\ "Occam Include Files (*.inc)\t*.inc\n" .
-	\ "Occam Source Files (*.occ)\t*.occ\n" .
-	\ "All Files (*.*)\t*.*\n"
+	\ "Occam Source Files (*.occ)\t*.occ\n"
+  if has("win32")
+    let b:browsefilter .= "All Files (*.*)\t*\n"
+  else
+    let b:browsefilter .= "All Files (*)\t*\n"
+  endif
 endif
 "}}}
 
 "{{{  Undo settings
 let b:undo_ftplugin = "setlocal shiftwidth< softtabstop< expandtab<"
 	\ . " formatoptions< comments< textwidth<"
-	\ . "| unlet! b:browsefiler"
+	\ . "| unlet! b:browsefilter"
 "}}}
 
 let &cpo = s:keepcpo