diff --git a/doc/api/child_process.md b/doc/api/child_process.md
index 0f022eb9482710..8f2ac384f707d6 100644
--- a/doc/api/child_process.md
+++ b/doc/api/child_process.md
@@ -1508,6 +1508,9 @@ then this will be `null`.
 `subprocess.stderr` is an alias for `subprocess.stdio[2]`. Both properties will
 refer to the same value.
 
+The `subprocess.stderr` property can be `null` if the child process could
+not be successfully spawned.
+
 ### `subprocess.stdin`
 <!-- YAML
 added: v0.1.90
@@ -1526,6 +1529,9 @@ then this will be `null`.
 `subprocess.stdin` is an alias for `subprocess.stdio[0]`. Both properties will
 refer to the same value.
 
+The `subprocess.stdin` property can be `undefined` if the child process could
+not be successfully spawned.
+
 ### `subprocess.stdio`
 <!-- YAML
 added: v0.7.10
@@ -1566,6 +1572,9 @@ assert.strictEqual(subprocess.stdio[2], null);
 assert.strictEqual(subprocess.stdio[2], subprocess.stderr);
 ```
 
+The `subprocess.stdio` property can be `undefined` if the child process could
+not be successfully spawned.
+
 ### `subprocess.stdout`
 <!-- YAML
 added: v0.1.90
@@ -1591,6 +1600,9 @@ subprocess.stdout.on('data', (data) => {
 });
 ```
 
+The `subprocess.stdout` property can be `null` if the child process could
+not be successfully spawned.
+
 ### `subprocess.unref()`
 <!-- YAML
 added: v0.7.10