diff --git a/ChangeLog b/ChangeLog
index 5b4f986fbb1..766efb9c02a 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -27,6 +27,9 @@ Following changes may create regression for some external modules, but were nece
   exists, but if an external module need action on it, it must provides itself its trigger file.
 * Use $conf->global->MULTICOMPANY_TRANSVERSE_MODE instead $conf->multicompany->transverse_mode
 * Use getEntity('xxx') instead getEntity('xxx', 1) and use getEntity('xxx', 0) instead getEntity('xxx')
+* The hook formObjectOptions was not implemented correctly in previous version. Sometimes, you had to return output 
+content by doing a print into function, sometimes by returning content into "resprint". This has been fixed to follow
+hook specifications so you must return output into "resprint".
 
 ***** ChangeLog for 5.0.3 compared to 5.0.2 *****
 FIX: #6677 Expired contracts dashboard box does not show the name of the thirdparty