diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
index 9c9ceead230..ab0654774be 100644
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -616,8 +616,8 @@ m_getzone(int size)
  * should go away with constant propagation for !MGETHDR.
  */
 static __inline int
-m_init(struct mbuf *m, uma_zone_t zone, int size, int how, short type,
-    int flags)
+m_init(struct mbuf *m, uma_zone_t zone __unused, int size __unused, int how,
+    short type, int flags)
 {
 	int error;
 
@@ -1122,7 +1122,7 @@ m_tag_first(struct mbuf *m)
  * Return the next tag in the list of tags associated with an mbuf.
  */
 static __inline struct m_tag *
-m_tag_next(struct mbuf *m, struct m_tag *t)
+m_tag_next(struct mbuf *m __unused, struct m_tag *t)
 {
 
 	return (SLIST_NEXT(t, m_tag_link));
@@ -1178,7 +1178,7 @@ m_free(struct mbuf *m)
 	return (n);
 }
 
-static int inline
+static __inline int
 rt_m_getfib(struct mbuf *m)
 {
 	KASSERT(m->m_flags & M_PKTHDR , ("Attempt to get FIB from non header mbuf."));