diff --git a/runtime/ftplugin/man.vim b/runtime/ftplugin/man.vim
index c6e1e9d..11b2b0a 100644
--- a/runtime/ftplugin/man.vim
+++ b/runtime/ftplugin/man.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	man
 " Maintainer:	SungHyun Nam <goweol@gmail.com>
-" Last Change:	2013 Jul 17
+" Last Change:	2014 Nov 12
 
 " To make the ":Man" command available before editing a manual page, source
 " this script from your startup vimrc file.
@@ -63,7 +63,9 @@
 func <SID>PreGetPage(cnt)
   if a:cnt == 0
     let old_isk = &iskeyword
-    setl iskeyword+=(,)
+    if &ft == 'man'
+      setl iskeyword+=(,)
+    endif
     let str = expand("<cword>")
     let &l:iskeyword = old_isk
     let page = substitute(str, '(*\(\k\+\).*', '\1', '')