diff --git a/doc/api/net.md b/doc/api/net.md
index e6bbb05b0e..e11f6cd627 100644
--- a/doc/api/net.md
+++ b/doc/api/net.md
@@ -58,11 +58,14 @@ added: v0.1.90
 -->
 
 Returns the bound address, the address family name, and port of the server
-as reported by the operating system.
+as reported by the operating system if listening on an IP socket.
 Useful to find which port was assigned when getting an OS-assigned address.
 Returns an object with `port`, `family`, and `address` properties:
 `{ port: 12346, family: 'IPv4', address: '127.0.0.1' }`
 
+For a server listening on a pipe or UNIX domain socket, the name is returned
+as a string.
+
 Example:
 
 ```js