diff --git a/lib/menubar/index_theme.lua b/lib/menubar/index_theme.lua
index b0d9f2e97..3ede62a93 100644
--- a/lib/menubar/index_theme.lua
+++ b/lib/menubar/index_theme.lua
@@ -149,11 +149,11 @@ end
 --- Query (part of) per-directory keys of a given subdirectory name.
 -- @deprecated menubar.index_theme:get_per_directory_keys
 -- @tparam table subdirectory Icon theme's subdirectory
--- @treturn[1] string Value of the `Type` key
--- @treturn[2] number Value of the `Size` key
--- @treturn[3] number VAlue of the `MinSize` key
--- @treturn[4] number Value of the `MaxSize` key
--- @treturn[5] number Value of the `Threshold` key
+-- @treturn string Value of the `Type` key
+-- @treturn number Value of the `Size` key
+-- @treturn number VAlue of the `MinSize` key
+-- @treturn number Value of the `MaxSize` key
+-- @treturn number Value of the `Threshold` key
 function index_theme:get_per_directory_keys(subdirectory)
     local keys = self.per_directory_keys[subdirectory]
     return keys[TYPE], keys[SIZE], keys[MINSIZE], keys[MAXSIZE], keys[THRESHOLD]