diff --git a/ChangeLog b/ChangeLog
index cc36bf92412..bab2b804a5c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -2,6 +2,10 @@
 English Dolibarr ChangeLog
 --------------------------------------------------------------
 
+
+***** ChangeLog for 3.5.6 compared to 3.5.5 *****
+Fix: Avoid missing class error for fetch_thirdparty method #1973
+
 ***** ChangeLog for 3.5.5 compared to 3.5.4 *****
 Fix: Holiday module was broken. Initializaion of amount of holidays failed.
 Fix: [ bug #1523 ] suite bug #1334 : filtre et ordre de tri conjoints ne s'appliquent pas.