diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index 999b8e24868..bda4362bed9 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -210,6 +210,8 @@ class ActionComm extends CommonObject
         if ($this->elementtype=='commande') $this->elementtype='order';
         if ($this->elementtype=='contrat')  $this->elementtype='contract';
 
+        if (is_object($this->contact) && $this->contact->id > 0 && ! ($this->contactid > 0)) $this->contactid = $this->contact->id;		// For backward compatibility. Using this->contact->xx is deprecated
+
         $userownerid=$this->userownerid;
         $userdoneid=$this->userdoneid;
 
@@ -274,13 +276,13 @@ class ActionComm extends CommonObject
         $sql.= "'".$this->db->idate($now)."',";
         $sql.= (strval($this->datep)!=''?"'".$this->db->idate($this->datep)."'":"null").",";
         $sql.= (strval($this->datef)!=''?"'".$this->db->idate($this->datef)."'":"null").",";
-        $sql.= (isset($this->durationp) && $this->durationp >= 0 && $this->durationp != ''?"'".$this->durationp."'":"null").",";	// deprecated
+        $sql.= ((isset($this->durationp) && $this->durationp >= 0 && $this->durationp != '')?"'".$this->durationp."'":"null").",";	// deprecated
         $sql.= (isset($this->type_id)?$this->type_id:"null").",";
         $sql.= (isset($this->type_code)?" '".$this->type_code."'":"null").",";
-        $sql.= (isset($this->socid) && $this->socid > 0?" '".$this->socid."'":"null").",";
-        $sql.= (isset($this->fk_project) && $this->fk_project > 0?" '".$this->fk_project."'":"null").",";
+        $sql.= ((isset($this->socid) && $this->socid > 0)?" '".$this->socid."'":"null").",";
+        $sql.= ((isset($this->fk_project) && $this->fk_project > 0)?" '".$this->fk_project."'":"null").",";
         $sql.= " '".$this->db->escape($this->note)."',";
-        $sql.= (isset($this->contact->id) && $this->contact->id > 0?"'".$this->contact->id."'":"null").",";
+        $sql.= ((isset($this->contactid) && $this->contactid > 0)?"'".$this->contactid."'":"null").",";
         $sql.= (isset($user->id) && $user->id > 0 ? "'".$user->id."'":"null").",";
         $sql.= ($userownerid>0?"'".$userownerid."'":"null").",";
         $sql.= ($userdoneid>0?"'".$userdoneid."'":"null").",";