diff --git a/sys/security/mac_biba/mac_biba.c b/sys/security/mac_biba/mac_biba.c
index 18f7a0fab5b..fa9d5e2cfec 100644
--- a/sys/security/mac_biba/mac_biba.c
+++ b/sys/security/mac_biba/mac_biba.c
@@ -2630,6 +2630,7 @@ static struct mac_policy_ops mac_biba_ops =
 	.mpo_destroy_socket_label = mac_biba_destroy_label,
 	.mpo_destroy_socket_peer_label = mac_biba_destroy_label,
 	.mpo_destroy_vnode_label = mac_biba_destroy_label,
+	.mpo_copy_mbuf_label = mac_biba_copy_label,
 	.mpo_copy_pipe_label = mac_biba_copy_label,
 	.mpo_copy_vnode_label = mac_biba_copy_label,
 	.mpo_externalize_cred_label = mac_biba_externalize_label,
diff --git a/sys/security/mac_mls/mac_mls.c b/sys/security/mac_mls/mac_mls.c
index e464a903b8c..2ceae3559c1 100644
--- a/sys/security/mac_mls/mac_mls.c
+++ b/sys/security/mac_mls/mac_mls.c
@@ -2393,6 +2393,7 @@ static struct mac_policy_ops mac_mls_ops =
 	.mpo_destroy_socket_label = mac_mls_destroy_label,
 	.mpo_destroy_socket_peer_label = mac_mls_destroy_label,
 	.mpo_destroy_vnode_label = mac_mls_destroy_label,
+	.mpo_copy_mbuf_label = mac_mls_copy_label,
 	.mpo_copy_pipe_label = mac_mls_copy_label,
 	.mpo_copy_vnode_label = mac_mls_copy_label,
 	.mpo_externalize_cred_label = mac_mls_externalize_label,