diff --git a/sys/kern/kern_rwlock.c b/sys/kern/kern_rwlock.c
index 10de56a7773..7bedf7682a6 100644
--- a/sys/kern/kern_rwlock.c
+++ b/sys/kern/kern_rwlock.c
@@ -196,8 +196,8 @@ void
 rw_destroy(struct rwlock *rw)
 {
 
-	KASSERT(rw->rw_lock == RW_UNLOCKED, ("rw lock not unlocked"));
-	KASSERT(rw->rw_recurse == 0, ("rw lock still recursed"));
+	KASSERT(rw->rw_lock == RW_UNLOCKED, ("rw lock %p not unlocked", rw));
+	KASSERT(rw->rw_recurse == 0, ("rw lock %p still recursed", rw));
 	rw->rw_lock = RW_DESTROYED;
 	lock_destroy(&rw->lock_object);
 }