diff --git a/lib/Hooks.php b/lib/Hooks.php
index be93ee4..4f4a4a1 100644
--- a/lib/Hooks.php
+++ b/lib/Hooks.php
@@ -46,21 +46,21 @@ class Hooks {
 
     protected static function deleteFile(IDBConnection $connection, $fileId) {
         $queryBuilder = $connection->getQueryBuilder();
-        $queryBuilder->delete('reader_bookmarks')->where('file_id = :file_id')->setParameter(':file_id', $fileId);
+        $queryBuilder->delete('reader_bookmarks')->where('file_id = :file_id')->setParameter('file_id', $fileId);
         $queryBuilder->execute();
 
         $queryBuilder = $connection->getQueryBuilder();
-        $queryBuilder->delete('reader_prefs')->where('file_id = :file_id')->setParameter(':file_id', $fileId); 
+        $queryBuilder->delete('reader_prefs')->where('file_id = :file_id')->setParameter('file_id', $fileId);
         $queryBuilder->execute();
     }
 
     protected static function deleteUser(IDBConnection $connection, $userId) {
         $queryBuilder = $connection->getQueryBuilder();
-        $queryBuilder->delete('reader_bookmarks')->where('user_id = :user_id')->setParameter(':user_id', $userId);
+        $queryBuilder->delete('reader_bookmarks')->where('user_id = :user_id')->setParameter('user_id', $userId);
         $queryBuilder->execute();
 
         $queryBuilder = $connection->getQueryBuilder();
-        $queryBuilder->delete('reader_prefs')->where('user_id = :user_id')->setParameter(':user_id', $userId); 
+        $queryBuilder->delete('reader_prefs')->where('user_id = :user_id')->setParameter('user_id', $userId); 
         $queryBuilder->execute();
     }