diff --git a/lib/gears/table.lua b/lib/gears/table.lua
index 54ceab4b..8b9bb6c2 100644
--- a/lib/gears/table.lua
+++ b/lib/gears/table.lua
@@ -18,7 +18,7 @@ local gtable = {}
 -- @return A new table containing all keys from the arguments.
 function gtable.join(...)
     local ret = {}
-    for _, t in pairs({...}) do
+    for _, t in ipairs({...}) do
         if t then
             for k, v in pairs(t) do
                 if type(k) == "number" then