diff --git a/lib/posix/pthread.c b/lib/posix/pthread.c
index 056bc25a0f3..9e3517902c3 100644
--- a/lib/posix/pthread.c
+++ b/lib/posix/pthread.c
@@ -86,14 +86,11 @@ int pthread_attr_setschedparam(pthread_attr_t *attr,
 {
 	int priority = schedparam->priority;
 
-	if (!attr || !attr->initialized) {
+	if (!attr || !attr->initialized ||
+	    (is_posix_prio_valid(priority, attr->schedpolicy) == false)) {
 		return EINVAL;
 	}
 
-	if (is_posix_prio_valid(priority, attr->schedpolicy) == false) {
-		return ENOTSUP;
-	}
-
 	attr->priority = priority;
 	return 0;
 }