1 files changed, 2 insertions, 1 deletions

diff --git a/src/ltn12.lua b/src/ltn12.lua
index 1014de2..dede0fa 100644
--- a/src/ltn12.lua
+++ b/src/ltn12.lua
@@ -9,6 +9,7 @@
 -----------------------------------------------------------------------------
 local string = require("string")
 local table = require("table")
+local unpack = unpack or table.unpack
 local base = _G
 local _M = {}
 if module then -- heuristic for exporting a global package table
@@ -42,7 +43,7 @@ end
 -- (thanks to Wim Couwenberg)
 function filter.chain(...)
     local arg = {...}
-    local n = select('#',...)
+    local n = base.select('#',...)
     local top, index = 1, 1
     local retry = ""
     return function(chunk)