diff --git a/pagination_head.php b/pagination_head.php
index f38cc4c1..68766148 100644
--- a/pagination_head.php
+++ b/pagination_head.php
@@ -50,9 +50,12 @@ if (isset($_GET['q'])) {
 
 // Sortby
 if (!empty($_GET['sb'])) {
-    $sb = sanitizeInput($_GET['sb']);
+    $sb = sanitizeInput(preg_replace('/[^a-z_]/', '', $_GET['sb']));
+    
 }
 
+//$sb = $_GET['sb'];
+
 // Date Handling
 if (empty($_GET['canned_date'])) {
     //Prevents lots of undefined variable errors.