diff --git a/doc/api/child_process.md b/doc/api/child_process.md
index 7ef5c82387346b..3a5f64d622885a 100644
--- a/doc/api/child_process.md
+++ b/doc/api/child_process.md
@@ -1389,9 +1389,9 @@ connection to the child.
 
 ### `subprocess.signalCode`
 
-* {integer}
+* {string|null}
 
-The `subprocess.signalCode` property indicates the signal number received by
+The `subprocess.signalCode` property indicates the signal received by
 the child process if any, else `null`.
 
 ### `subprocess.spawnargs`