diff --git a/dblayeroo.php b/dblayeroo.php
index 1c65b34..3ab1b66 100644
--- a/dblayeroo.php
+++ b/dblayeroo.php
@@ -1898,8 +1898,9 @@ class dblayeroo
      $this->DBException (sprintf (
        "Invalid field to whereAdd '%s' : not defined in table", $field));
     $operator = strtoupper ($operator);
-    $allowed = array ("=", "<=", ">=", "!=", "LIKE", "NOT LIKE", "IS NULL",
-                      "IS NOT NULL", "REGEXP", "NOT REGEXP");
+    $allowed = array ("=", "<", "<=", ">", ">=", "!=",
+                      "LIKE", "NOT LIKE", "IS NULL", "IS NOT NULL",
+                      "REGEXP", "NOT REGEXP");
     if (! in_array ($operator, $allowed))
       $this->DBException ("Invalid operator provided (unknown operator)");
     // TODO : Check if the value is corresponding to the type of the column