diff --git a/module/zfs/zvol.c b/module/zfs/zvol.c
index 5b6a3f5cb4..a71f373839 100644
--- a/module/zfs/zvol.c
+++ b/module/zfs/zvol.c
@@ -372,7 +372,7 @@ zvol_set_volthreading(const char *name, boolean_t value)
 {
 	zvol_state_t *zv = zvol_find_by_name(name, RW_NONE);
 	if (zv == NULL)
-		return (ENOENT);
+		return (-1);
 	zv->zv_threading = value;
 	mutex_exit(&zv->zv_state_lock);
 	return (0);