diff --git a/.changes/add-code-single-instance-autostart.md b/.changes/add-code-single-instance-autostart.md
new file mode 100644
index 000000000..6a76e6ddf
--- /dev/null
+++ b/.changes/add-code-single-instance-autostart.md
@@ -0,0 +1,6 @@
+---
+"tauri-cli": patch:bug
+"@tauri-apps/cli": patch:bug
+---
+
+Fix the generated plugin init code of `tauri add` for `tauri-plugin-autostart` and `tauri-plugin-single-instance`
diff --git a/crates/tauri-cli/src/add.rs b/crates/tauri-cli/src/add.rs
index e4ee3622e..aed598ec4 100644
--- a/crates/tauri-cli/src/add.rs
+++ b/crates/tauri-cli/src/add.rs
@@ -130,6 +130,8 @@ pub fn run(options: Options) -> Result<()> {
     "Builder::new(|pass| todo!()).build()"
   } else if plugin == "localhost" {
     "Builder::new(todo!()).build()"
+  } else if plugin == "single-instance" {
+    "init(|app, args, cwd| {})"
   } else if metadata.builder {
     "Builder::new().build()"
   } else {
diff --git a/crates/tauri-cli/src/helpers/plugins.rs b/crates/tauri-cli/src/helpers/plugins.rs
index 3d933af58..d3d823d53 100644
--- a/crates/tauri-cli/src/helpers/plugins.rs
+++ b/crates/tauri-cli/src/helpers/plugins.rs
@@ -38,6 +38,7 @@ pub fn known_plugins() -> HashMap<&'static str, PluginMetadata> {
 
   // uses builder pattern
   for p in [
+    "autostart",
     "global-shortcut",
     "localhost",
     "log",