diff --git a/lib/isc/util.h b/lib/isc/util.h
index e1f606c7c0..d0b2c2a7dd 100644
--- a/lib/isc/util.h
+++ b/lib/isc/util.h
@@ -31,15 +31,15 @@
  */
 
 #define LOCK(lp) \
-	INSIST(isc_mutex_lock((lp)) == ISC_R_SUCCESS);
+	INSIST(isc_mutex_lock((lp)) == ISC_R_SUCCESS)
 #define UNLOCK(lp) \
-	INSIST(isc_mutex_unlock((lp)) == ISC_R_SUCCESS);
+	INSIST(isc_mutex_unlock((lp)) == ISC_R_SUCCESS)
 #define BROADCAST(cvp) \
-	INSIST(isc_condition_broadcast((cvp)) == ISC_R_SUCCESS);
+	INSIST(isc_condition_broadcast((cvp)) == ISC_R_SUCCESS)
 #define SIGNAL(cvp) \
-	INSIST(isc_condition_signal((cvp)) == ISC_R_SUCCESS);
+	INSIST(isc_condition_signal((cvp)) == ISC_R_SUCCESS)
 #define WAIT(cvp, lp) \
-	INSIST(isc_condition_wait((cvp), (lp)) == ISC_R_SUCCESS);
+	INSIST(isc_condition_wait((cvp), (lp)) == ISC_R_SUCCESS)
 
 /*
  * isc_condition_waituntil can return ISC_R_TIMEDOUT, so we
@@ -49,4 +49,9 @@
 #define WAITUNTIL(cvp, lp, tp) \
 	isc_condition_waituntil((cvp), (lp), (tp))
 
+#define RWLOCK(lp, t) \
+	INSIST(isc_rwlock_lock((lp), (t)) == ISC_R_SUCCESS)
+#define RWUNLOCK(lp, t) \
+	INSIST(isc_rwlock_unlock((lp), (t)) == ISC_R_SUCCESS)
+
 #endif /* ISC_UTIL_H */