diff --git a/runtime/ftplugin/cobol.vim b/runtime/ftplugin/cobol.vim
index 203d734..11ad3ad 100644
--- a/runtime/ftplugin/cobol.vim
+++ b/runtime/ftplugin/cobol.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	cobol
 " Author:	Tim Pope <vimNOSPAM@tpope.info>
-" $Id: cobol.vim,v 1.1 2007/05/05 17:24:38 vimboss Exp $
+" Last Update:	By ZyX: use shiftwidth()
 
 " Insert mode mappings: <C-T> <C-D> <Tab>
 " Normal mode mappings: < > << >> [[ ]] [] ][
@@ -113,7 +113,7 @@
 
 function! s:increase(...)
     let lnum = '.'
-    let sw = &shiftwidth
+    let sw = shiftwidth()
     let i = a:0 ? a:1 : indent(lnum)
     if i >= 11
         return sw - (i - 11) % sw
@@ -128,7 +128,7 @@
 
 function! s:decrease(...)
     let lnum = '.'
-    let sw = &shiftwidth
+    let sw = shiftwidth()
     let i = indent(a:0 ? a:1 : lnum)
     if i >= 11 + sw
         return 1 + (i + 12) % sw
@@ -147,7 +147,7 @@
     let head = strpart(getline('.'),0,7)
     let tail = strpart(getline('.'),7)
     let indent = match(tail,'[^ ]')
-    let sw = &shiftwidth
+    let sw = shiftwidth()
     let shift = a:shift
     if shift > 0
         if indent < 4
@@ -221,7 +221,8 @@
 function! s:Tab()
     if (strpart(getline('.'),0,col('.')-1) =~ '^\s*$' && &sta)
         return s:IncreaseIndent()
-    elseif &sts == &sw && &sts != 8 && &et
+    " &softtabstop < 0: &softtabstop follows &shiftwidth
+    elseif (&sts < 0 || &sts == shiftwidth()) && &sts != 8 && &et
         return s:repeat(" ",s:increase(col('.')-1))
     else
         return "\<Tab>"