--- a/configure.ac	2025-05-22 22:36:57.332625302 -0000
+++ b/configure.ac	2025-05-22 22:37:17.729090112 -0000
@@ -401,7 +401,7 @@ fi
 
 AC_MSG_CHECKING([kernel source for id in struct pernet_operations])
 if test -f $ksourcedir/include/net/net_namespace.h && \
-   $AWK '/^struct pernet_operations /,/^}/' $ksourcedir/include/net/net_namespace.h | $GREP -q 'int \*id;'; then
+   $AWK '/^struct pernet_operations /,/^}/' $ksourcedir/include/net/net_namespace.h | $GREP -qE 'int \*id;|int \* const id'; then
 	AC_MSG_RESULT(yes)
 	AC_SUBST(HAVE_NET_OPS_ID, define)
 else