diff --git a/dblayer.php b/dblayer.php
index 7a01582..8851b68 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -85,6 +85,14 @@ class dblayer extends PDO
     {
       throw new Exception ("PDO error : ".$e->getMessage());
     }
+
+    // Force specifics initialisations
+    switch ($this->db->getAttribute(PDO::ATTR_DRIVER_NAME))
+    {
+    case "sqlite":
+      // Force ForeignKeys support (disabled by default)
+      $this->db->exec("PRAGMA foreign_keys = ON");
+    }
   }
 
   /** Create a new entry in the table. Datas must be an indexed array
@@ -331,7 +339,9 @@ class dblayer extends PDO
       }
       else
       {
-        if (!array_key_exists ($columns, $datasOK)) continue;
+        // FIXME ! Problem if $datasOK contains primary / else can be warned on 
+        //         $datasOK[$columns] if it doesn't exists
+        if (array_key_exists ($columns, $datasOK)) continue;
         $select = array ();
         if ($columns !== $this->primary)
           $select[] = array ($this->primary, $updatekey, "!=");