diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index bc6aa71e683c..c94558f4ef4d 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -129,7 +129,8 @@ m_dup_pkthdr(struct mbuf *to, struct mbuf *from, int how)
 	mac_create_mbuf_from_mbuf(from, to);
 #endif
 	SLIST_INIT(&to->m_pkthdr.tags);
-	return (m_tag_copy_chain(to, from, how));
+	return (m_tag_copy_chain(to, from, (how & M_TRYWAIT) ? M_WAITOK :
+	    M_NOWAIT));
 }
 
 /*