diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
index ed6344ca05b3..2d49f1b2c42c 100644
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -587,8 +587,8 @@ struct mcntfree_lst {
 	struct mbuf *_mm = (m);						\
 	int _mt = (t);							\
 									\
-	atomic_subtract_long(mbtypes[_mm->m_type], 1);			\
-	atomic_add_long(mbtypes[_mt], 1);				\
+	atomic_subtract_long(&mbtypes[_mm->m_type], 1);			\
+	atomic_add_long(&mbtypes[_mt], 1);				\
 	_mm->m_type = (_mt);						\
 } while (0)