diff --git a/configure.in b/configure.in
index fd4d6e5..301c1d6 100644
--- a/configure.in
+++ b/configure.in
@@ -3,7 +3,7 @@ dnl autoconf input file to generate MCONFIG
 dnl
 
 AC_PREREQ(2.13)
-AC_REVISION($Id$)
+AC_REVISION([$Id$])
 AC_INIT(MCONFIG.in)
 AC_PREFIX_DEFAULT(/usr)