diff --git a/reference/mysqli/persistconns.xml b/reference/mysqli/persistconns.xml
index 58e73ac551..eb8fdd8b91 100644
--- a/reference/mysqli/persistconns.xml
+++ b/reference/mysqli/persistconns.xml
@@ -14,6 +14,12 @@
connections every time one is required, as unused connections are
cached and ready to be reused.
+
+
+ Unlike the mysql extension, mysqli does not provide a separate function
+ for opening persistent connections. To open a persistent connection you
+ must prepend p: to the hostname when connecting.
+
The problem with persistent connections is that they can be left in