diff --git a/config/opal_functions.m4 b/config/opal_functions.m4
index 88dde53fab..f967b2e516 100644
--- a/config/opal_functions.m4
+++ b/config/opal_functions.m4
@@ -393,4 +393,5 @@ AC_DEFUN([_OPAL_WITH_OPTION_MIN_MAX_VALUE], [
     AC_MSG_RESULT([$max_value])
     AC_DEFINE_UNQUOTED([OPAL_MAX_]m4_toupper($1), $max_value,
                        [Maximum length of ]m4_translit($1, [_], [ ])[s (default is $2)])
+    AC_SUBST([OPAL_MAX_]m4_toupper($1))
 ])dnl