diff --git a/dblayer.php b/dblayer.php
index 6a33624..5528b38 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -281,11 +281,11 @@ class dblayer extends PDO
         // Skipped the removed autoincrement keys
         continue;
       }
-      elseif (! is_string ($datas[$key]))
+      elseif (! is_string ($datas[$key]) && ! is_integer ($datas[$key]))
       {
         $errors[$key] = array ("error", sprintf (
                             dgettext("domframework",
-                       "Errors in consistency : '%s' is not an string [is %s]"),
+                  "Errors in consistency : '%s' is not an integer or a string [is %s]"),
                             $key, gettype ($datas[$key])));
         continue;
       }