diff --git a/m4/openmp.m4 b/m4/openmp.m4
index e7b0e7b..dbfbece 100644
--- a/m4/openmp.m4
+++ b/m4/openmp.m4
@@ -1,10 +1,12 @@
-# openmp.m4 serial 4
-dnl Copyright (C) 2006-2007 Free Software Foundation, Inc.
+# openmp.m4 serial 5
+dnl Copyright (C) 2006-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.

 dnl This file can be removed once we assume autoconf >= 2.62.
+dnl Expand to nothing in autoconf >= 2.62. m4_copy has a different
+m4_ifdef([AC_OPENMP], [], [

 # _AC_LANG_OPENMP
 # ---------------
@@ -92,3 +94,5 @@ AC_DEFUN([AC_OPENMP],
   fi
   AC_SUBST([OPENMP_]_AC_LANG_PREFIX[FLAGS])
 ])
+
+])
--
1.6.6.1