diff --git a/Koha/Hold.pm b/Koha/Hold.pm
index 7375a8fdca..921906a07b 100644
--- a/Koha/Hold.pm
+++ b/Koha/Hold.pm
@@ -222,6 +222,10 @@ sub set_waiting {
 
 =head3 set_processing
 
+$hold->set_processing;
+
+Mark the hold as in processing.
+
 =cut
 
 sub set_processing {