diff --git a/runtime/indent/xf86conf.vim b/runtime/indent/xf86conf.vim
index 7c3ea15..5a8bc0f 100644
--- a/runtime/indent/xf86conf.vim
+++ b/runtime/indent/xf86conf.vim
@@ -26,11 +26,11 @@
   let ind = indent(lnum)
 
   if getline(lnum) =~? '^\s*\(Sub\)\=Section\>'
-    let ind = ind + &sw
+    let ind = ind + shiftwidth()
   endif
 
   if getline(v:lnum) =~? '^\s*End\(Sub\)\=Section\>'
-    let ind = ind - &sw
+    let ind = ind - shiftwidth()
   endif
 
   return ind