diff --git a/classes/PrettyBlocksModel.php b/classes/PrettyBlocksModel.php
index 82d7d21e..38ba9328 100644
--- a/classes/PrettyBlocksModel.php
+++ b/classes/PrettyBlocksModel.php
@@ -80,7 +80,7 @@ private function removeConfig()
     {
         $id = $this->id_prettyblocks;
         $key = $id . "\_%_CONFIG";
-        $sql = 'SELECT name FROM ' . _DB_PREFIX_ . "configuration WHERE name LIKE '" . $key . "'";
+        $sql = 'SELECT name FROM ' . _DB_PREFIX_ . "configuration WHERE name LIKE '" . pSQL($key) . "'";
         $keys = Db::getInstance()->executeS($sql);
         if (count($keys) > 0) {
             foreach ($keys as $k) {