diff --git a/sys/kern/kern_umtx.c b/sys/kern/kern_umtx.c
--- a/sys/kern/kern_umtx.c
+++ b/sys/kern/kern_umtx.c
@@ -2605,11 +2605,9 @@
 			 */
 			if (error == 0) {
 				error = thread_check_susp(td, false);
-				if (error == 0) {
-					if (try != 0)
-						error = EBUSY;
-					else
-						continue;
+				if (error == 0 && try == 0) {
+					umtxq_unbusy_unlocked(&uq->uq_key);
+					continue;
 				}
 				error = 0;
 			}