diff --git a/Documentation/git-receive-pack.adoc b/Documentation/git-receive-pack.adoc
index 0956086d61..5806792ba7 100644
--- a/Documentation/git-receive-pack.adoc
+++ b/Documentation/git-receive-pack.adoc
@@ -236,6 +236,14 @@ if the repository is packed and is served via a dumb transport.
 exec git update-server-info
 ----
 
+PROC-RECEIVE HOOK
+-----------------
+This hook is invoked by linkgit:git-receive-pack[1].  If the server has
+set the multi-valued config variable `receive.procReceiveRefs`, and the
+commands sent to 'receive-pack' have matching reference names, these
+commands will be executed by this hook, instead of by the internal
+`execute_commands()` function.  This hook is responsible for updating
+the relevant references and reporting the results back to 'receive-pack'.
 
 QUARANTINE ENVIRONMENT
 ----------------------