diff --git a/dblayer.php b/dblayer.php
index 818aa0c..824810c 100644
--- a/dblayer.php
+++ b/dblayer.php
@@ -768,6 +768,9 @@ class dblayer extends PDO
       throw new Exception (dgettext("domframework", "No Field defined"), 500);
     if ($this->primary === null)
       throw new Exception (dgettext("domframework", "No Primary defined"), 500);
+    if (count ($datas) === 0)
+      throw new Exception (dgettext("domframework",
+                                    "No data to update provided"), 500);
     $datasOK = array ();
     $errors = $this->verify ($datas, $updatekey);
     if (count ($errors) !== 0)