diff --git a/doc/api/child_process.md b/doc/api/child_process.md
index b3c9d10250f759..b7c0d52a0fd5c8 100644
--- a/doc/api/child_process.md
+++ b/doc/api/child_process.md
@@ -1022,7 +1022,7 @@ within the child process to close the IPC channel as well.
 added: v0.1.90
 -->
 
-* `signal` {string}
+* `signal` {number|string}
 
 The `subprocess.kill()` method sends a signal to the child process. If no
 argument is given, the process will be sent the `'SIGTERM'` signal. See