diff --git a/dblayer.php b/dblayer.php
index 455378a..15c3439 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -462,6 +462,11 @@ class dblayer extends PDO
       throw new Exception (dgettext("domframework",
                            "The datas provided to create are not array"),
                            405);
+    foreach ($this->fields as $key=>$params)
+    {
+      if (in_array ("autoincrement", $params))
+        $datas[$key] = null;
+    }
     if (!in_array ($this->primary, $this->unique))
       $this->unique[] = $this->primary;
     $datasOK = array ();