diff --git a/lib/awful/client.lua b/lib/awful/client.lua
index 8b4a5d29..178a2f02 100644
--- a/lib/awful/client.lua
+++ b/lib/awful/client.lua
@@ -32,7 +32,7 @@ do
             screen = require("awful.screen")
             return screen[k]
         end,
-        _newindex = error -- Just to be sure in case anything ever does this
+        __newindex = error -- Just to be sure in case anything ever does this
     })
 end
 local client = {}