diff --git a/meta/template/basic.lua b/meta/template/basic.lua
index aed3085e5..3d59858da 100644
--- a/meta/template/basic.lua
+++ b/meta/template/basic.lua
@@ -7,7 +7,7 @@ arg = {}
 ---#DES 'assert'
 ---@generic T
 ---@param v T
----@param message any
+---@param message? any
 ---@return T
 function assert(v, message) end
 
diff --git a/meta/template/io.lua b/meta/template/io.lua
index b2846878b..d5f5fd584 100644
--- a/meta/template/io.lua
+++ b/meta/template/io.lua
@@ -47,7 +47,7 @@ function io.lines(filename, ...) end
 
 ---#DES 'io.open'
 ---@param filename string
----@param mode     openmode
+---@param mode?    openmode
 ---@return file*?
 ---@return string? errmsg
 ---@nodiscard
diff --git a/meta/template/string.lua b/meta/template/string.lua
index 0e0d0537b..a115648e0 100644
--- a/meta/template/string.lua
+++ b/meta/template/string.lua
@@ -65,7 +65,7 @@ function string.gmatch(s, pattern, init) end
 ---@param s       string
 ---@param pattern string
 ---@param repl    string|table|function
----@param n       integer
+---@param n?      integer
 ---@return string
 ---@return integer count
 ---@nodiscard
diff --git a/meta/template/table.lua b/meta/template/table.lua
index 022883424..a7fe68d2c 100644
--- a/meta/template/table.lua
+++ b/meta/template/table.lua
@@ -52,7 +52,7 @@ function table.remove(list, pos) end
 ---#DES 'table.sort'
 ---@generic T
 ---@param list T[]
----@param comp fun(a: T, b: T):boolean
+---@param comp? fun(a: T, b: T):boolean
 function table.sort(list, comp) end
 
 ---@version >5.2, JIT