diff --git a/docs/deployment.md b/docs/deployment.md
index 82d19a083a95a..ef33914933cc0 100644
--- a/docs/deployment.md
+++ b/docs/deployment.md
@@ -139,11 +139,13 @@ Sometimes you might want to run some cleanup code on process signals like `SIGTE
 
 You can do that by setting the env variable `NEXT_MANUAL_SIG_HANDLE` to `true` and then register a handler for that signal inside your `_document.js` file. Please note that you need to register env variable directly in the system env variable, not in the `.env` file.
 
+> **Note**: Manual signal handling is not available in `next dev`.
+
 ```json
 // package.json
 {
   "scripts": {
-    "dev": "NEXT_MANUAL_SIG_HANDLE=true next dev",
+    "dev": "next dev",
     "build": "next build",
     "start": "NEXT_MANUAL_SIG_HANDLE=true next start"
   }