diff --git a/dblayeroo.php b/dblayeroo.php
index 9be5aa5..efca24e 100644
--- a/dblayeroo.php
+++ b/dblayeroo.php
@@ -1861,6 +1861,9 @@ class dblayeroo
       if (! array_key_exists ($key, $this->fields))
         $this->DBException (sprintf (
           "Invalid field to setValues '%s' : not defined in table", $key));
+      if (! is_string ($val) && ! is_int ($val))
+        $this->DBException (sprintf (
+          "Invalid field to setValues '%s': not string and not integer", $key));
       $tmpValues[$key] = $val;
       $tmpType[md5 ("$key, $val")] = $this->fieldTypeLight ($key);
       $this->debugLog ("setValues : Type for $key = ".