diff --git a/src/devices/nm-device.c b/src/devices/nm-device.c
index d4193384b..2b093ea96 100644
--- a/src/devices/nm-device.c
+++ b/src/devices/nm-device.c
@@ -7421,8 +7421,10 @@ addrconf6_start_with_link_ready (NMDevice *self)
 	}
 
 	/* Apply any manual configuration before starting RA */
-	if (!ip6_config_merge_and_apply (self, TRUE))
+	if (!ip6_config_merge_and_apply (self, TRUE)) {
 		_LOGW (LOGD_IP6, "failed to apply manual IPv6 configuration");
+		g_clear_object (&priv->con_ip6_config);
+	}
 
 	/* XXX: These sysctls would probably be better set by the lndp ndisc itself. */
 	switch (nm_ndisc_get_node_type (priv->ndisc)) {