diff --git a/src/pipewire/thread.c b/src/pipewire/thread.c
index 8bba05501..baca12212 100644
--- a/src/pipewire/thread.c
+++ b/src/pipewire/thread.c
@@ -131,10 +131,18 @@ static int impl_join(void *object, struct spa_thread *thread, void **retval)
 static int impl_get_rt_range(void *object, const struct spa_dict *props,
 		int *min, int *max)
 {
-	if (min)
+	if (min) {
 		*min = sched_get_priority_min(SCHED_OTHER);
-	if (max)
+		if (*min < 0)
+			return -errno;
+	}
+
+	if (max) {
 		*max = sched_get_priority_max(SCHED_OTHER);
+		if (*max < 0)
+			return -errno;
+	}
+
 	return 0;
 }
 static int impl_acquire_rt(void *object, struct spa_thread *thread, int priority)