diff --git a/doc/cli/npm-ping.md b/doc/cli/npm-ping.md
index 3b2da9944bb24..f92fbb07d5bfe 100644
--- a/doc/cli/npm-ping.md
+++ b/doc/cli/npm-ping.md
@@ -17,6 +17,8 @@ otherwise you will get:
 Ping error: {*Detail about error}
 ```
 
+Note that the details returned is up to the registry.
+
 ## SEE ALSO
 
 * npm-config(1)