diff --git a/sys/kern/sched_4bsd.c b/sys/kern/sched_4bsd.c
index cf215f5355dd..b4098c83e7ad 100644
--- a/sys/kern/sched_4bsd.c
+++ b/sys/kern/sched_4bsd.c
@@ -1462,9 +1462,8 @@ sched_bind(struct thread *td, int cpu)
 {
 	struct td_sched *ts;
 
-	THREAD_LOCK_ASSERT(td, MA_OWNED);
-	KASSERT(TD_IS_RUNNING(td),
-	    ("sched_bind: cannot bind non-running thread"));
+	THREAD_LOCK_ASSERT(td, MA_OWNED|MA_NOTRECURSED);
+	KASSERT(td == curthread, ("sched_bind: can only bind curthread"));
 
 	ts = td->td_sched;
 
@@ -1482,6 +1481,7 @@ void
 sched_unbind(struct thread* td)
 {
 	THREAD_LOCK_ASSERT(td, MA_OWNED);
+	KASSERT(td == curthread, ("sched_unbind: can only bind curthread"));
 	td->td_flags &= ~TDF_BOUND;
 }
 
diff --git a/sys/kern/sched_ule.c b/sys/kern/sched_ule.c
index f5e5ee0274ab..274b2b1e04f0 100644
--- a/sys/kern/sched_ule.c
+++ b/sys/kern/sched_ule.c
@@ -2427,6 +2427,7 @@ sched_bind(struct thread *td, int cpu)
 	struct td_sched *ts;
 
 	THREAD_LOCK_ASSERT(td, MA_OWNED|MA_NOTRECURSED);
+	KASSERT(td == curthread, ("sched_bind: can only bind curthread"));
 	ts = td->td_sched;
 	if (ts->ts_flags & TSF_BOUND)
 		sched_unbind(td);
@@ -2448,6 +2449,7 @@ sched_unbind(struct thread *td)
 	struct td_sched *ts;
 
 	THREAD_LOCK_ASSERT(td, MA_OWNED);
+	KASSERT(td == curthread, ("sched_unbind: can only bind curthread"));
 	ts = td->td_sched;
 	if ((ts->ts_flags & TSF_BOUND) == 0)
 		return;