diff --git a/runtime/indent/occam.vim b/runtime/indent/occam.vim
index ba978e0..bebb052 100644
--- a/runtime/indent/occam.vim
+++ b/runtime/indent/occam.vim
@@ -20,6 +20,8 @@
 if exists("*GetOccamIndent")
   finish
 endif
+let s:keepcpo= &cpo
+set cpo&vim
 
 "{{{  Indent definitions
 " Define carriage return indent
@@ -180,3 +182,6 @@
 
 endfunction
 "}}}
+
+let &cpo = s:keepcpo
+unlet s:keepcpo