diff --git a/runtime/ftplugin/kwt.vim b/runtime/ftplugin/kwt.vim
index 6d4b8fd..05b40d4 100644
--- a/runtime/ftplugin/kwt.vim
+++ b/runtime/ftplugin/kwt.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	Kimwitu++
 " Maintainer:	Michael Piefel <entwurf@piefel.de>
-" Last Change:	10 December 2011
+" Last Change:	10 March 2012
 
 " Behaves almost like C++
 runtime! ftplugin/cpp.vim ftplugin/cpp_*.vim ftplugin/cpp/*.vim
@@ -20,5 +20,13 @@
 " Set the errorformat for the Kimwitu++ compiler
 set efm+=kc%.%#:\ error\ at\ %f:%l:\ %m
 
+if exists("b:undo_ftplugin")
+    let b:undo_ftplugin = b:undo_ftplugin . " | setlocal efm<"
+	\ . "| unlet! b:browsefiler"
+else
+    let b:undo_ftplugin = "setlocal efm<"
+	\ . "| unlet! b:browsefiler"
+endif
+
 let &cpo = s:cpo_save
 unlet s:cpo_save