diff --git a/sys/sys/mbuf.h b/sys/sys/mbuf.h
index 249b29e6455..c2b70810392 100644
--- a/sys/sys/mbuf.h
+++ b/sys/sys/mbuf.h
@@ -247,7 +247,7 @@ struct mbuf {
 #define	M_HASHTYPE_SET(m, v)	do {					\
 	(m)->m_flags &= ~M_HASHTYPEBITS;				\
 	(m)->m_flags |= ((v) << M_HASHTYPE_SHIFT);			\
-while (0)
+} while (0)
 #define	M_HASHTYPE_TEST(m, v)	(M_HASHTYPE_GET(m) == (v))
 
 /*