diff --git a/ChangeLog b/ChangeLog
index 2c85b48924f..7113b325833 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -239,6 +239,7 @@ FIX: Not showing task extrafields when creating from left menu
 FIX [ bug #3288 ] Tasks box is not properly drawn
 FIX [ bug #3211 ] Outstading bill amount of a client showed wrong amounts
 FIX [ bug #3321 ] Users with certain permissions were shown a "forbidden access" page even if they had the rights
+FIX [ bug #3426 ] Unable to create an invoice from a contract with extrafields
 
 NEW: Created new ContratLigne::insert function
 
diff --git a/htdocs/compta/resultat/clientfourn.php b/htdocs/compta/resultat/clientfourn.php
index 999c3ff2fa1..bd3b8cd2753 100644
--- a/htdocs/compta/resultat/clientfourn.php
+++ b/htdocs/compta/resultat/clientfourn.php
@@ -309,7 +309,7 @@ if ($modecompta == 'CREANCES-DETTES')
 }
 else
 {
-    $sql = "SELECT s.nom, s.rowid as socid, sum(pf.amount) as amount_ttc";
+    $sql = "SELECT s.nom as name, s.rowid as socid, sum(pf.amount) as amount_ttc";
     $sql.= " FROM ".MAIN_DB_PREFIX."paiementfourn as p";
     $sql.= ", ".MAIN_DB_PREFIX."paiementfourn_facturefourn as pf";
     $sql.= " LEFT JOIN ".MAIN_DB_PREFIX."facture_fourn as f";
diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 073cd510f8c..ed80a152665 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -3588,6 +3588,11 @@ abstract class CommonObject
     {
     	if (empty($rowid)) $rowid=$this->id;
 
+        //To avoid SQL errors. Probably not the better solution though
+        if (!$this->table_element) {
+            return 0;
+        }
+
         if (! is_array($optionsArray))
         {
             // optionsArray not already loaded, so we load it