diff --git a/ggsn/ggsn.c b/ggsn/ggsn.c
index 0cd0feb..0603773 100644
--- a/ggsn/ggsn.c
+++ b/ggsn/ggsn.c
@@ -534,6 +534,8 @@
 	if (apn->cfg.gtpu_mode == APN_GTPU_MODE_KERNEL_GTP) {
 		if (gtp_kernel_tunnel_add(pdp, apn->tun.cfg.dev_name) < 0) {
 			LOGPPDP(LOGL_ERROR, pdp, "Cannot add tunnel to kernel: %s\n", strerror(errno));
+			if (addrv6 && errno == EINVAL)
+				LOGPPDP(LOGL_ERROR, pdp, "Maybe your kernel does not support GTP-U with IPv6 yet?\n");
 			gtp_create_context_resp(gsn, pdp, GTPCAUSE_SYS_FAIL);
 			return 0;
 		}