diff --git a/libs/libc/sched/task_setcanceltype.c b/libs/libc/sched/task_setcanceltype.c
index 6715327804..0130d07e04 100644
--- a/libs/libc/sched/task_setcanceltype.c
+++ b/libs/libc/sched/task_setcanceltype.c
@@ -55,5 +55,5 @@ int task_setcanceltype(int type, FAR int *oldtype)
 
   /* Check the requested cancellation type */
 
-  return (type == TASK_CANCEL_ASYNCHRONOUS) ? OK : ENOSYS;
+  return (type == TASK_CANCEL_ASYNCHRONOUS) ? OK : EINVAL;
 }