diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0b3f20aa..11ff0bc4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Changed
+
+- Rustc: Do not need a main function, and make it can use 2024 edition by unstable-options.
+
 ## [4.6.0] - 2024-02-07
 
 ### Added
diff --git a/lua/rustaceanvim/commands/rustc_unpretty.lua b/lua/rustaceanvim/commands/rustc_unpretty.lua
index 9c797dea..f81d516c 100644
--- a/lua/rustaceanvim/commands/rustc_unpretty.lua
+++ b/lua/rustaceanvim/commands/rustc_unpretty.lua
@@ -129,22 +129,18 @@ function M.rustc_unpretty(level)
   end
   text = table.concat(b, '\n')
 
-  compat.system(
-    {
-      rustc,
-      '--crate-type',
-      'lib',
-      '--edition',
-      config.tools.rustc.edition,
-      '-Z',
-      'unstable-options',
-      '-Z',
-      'unpretty=' .. level,
-      '-',
-    },
-    { stdin = text },
-    vim.schedule_wrap(handler)
-  )
+  compat.system({
+    rustc,
+    '--crate-type',
+    'lib',
+    '--edition',
+    config.tools.rustc.edition,
+    '-Z',
+    'unstable-options',
+    '-Z',
+    'unpretty=' .. level,
+    '-',
+  }, { stdin = text }, vim.schedule_wrap(handler))
 end
 
 return M