diff --git a/sys/contrib/openzfs/module/zfs/arc.c b/sys/contrib/openzfs/module/zfs/arc.c
index 55c71a3829c..c36bb58b9aa 100644
--- a/sys/contrib/openzfs/module/zfs/arc.c
+++ b/sys/contrib/openzfs/module/zfs/arc.c
@@ -10651,10 +10651,10 @@ EXPORT_SYMBOL(arc_remove_prune_callback);
 
 /* BEGIN CSTYLED */
 ZFS_MODULE_PARAM_CALL(zfs_arc, zfs_arc_, min, param_set_arc_long,
-	param_get_long, ZMOD_RW, "Min arc size");
+	param_get_long, ZMOD_RW, "Min arc size in bytes");
 
 ZFS_MODULE_PARAM_CALL(zfs_arc, zfs_arc_, max, param_set_arc_long,
-	param_get_long, ZMOD_RW, "Max arc size");
+	param_get_long, ZMOD_RW, "Max arc size in bytes");
 
 ZFS_MODULE_PARAM_CALL(zfs_arc, zfs_arc_, meta_limit, param_set_arc_long,
 	param_get_long, ZMOD_RW, "Metadata limit for arc size");