diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index a6eaa18f4fb6..07e101416e6a 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -678,6 +678,7 @@ resume:
 					ktrcsw(p->p_tracep, 0, 0);
 #endif
 				rval = EWOULDBLOCK;
+				mtx_exit(&sched_lock, MTX_SPIN);
 				goto out;
 			}
 		} else if (timo)