diff --git a/src/Content/ContentManager.py b/src/Content/ContentManager.py
index 7ffba6a1..edb70533 100644
--- a/src/Content/ContentManager.py
+++ b/src/Content/ContentManager.py
@@ -247,6 +247,9 @@ class ContentManager(object):
         else:
             return 0
 
+    def listModified(self, since):
+        return self.contents.db.listModified(self.site.address, since)
+
 
     # Returns if file with the given modification date is archived or not
     def isArchived(self, inner_path, modified):
diff --git a/src/File/FileRequest.py b/src/File/FileRequest.py
index f132e25f..edbcbb16 100644
--- a/src/File/FileRequest.py
+++ b/src/File/FileRequest.py
@@ -291,11 +291,7 @@ class FileRequest(object):
         if not site or not site.settings["serving"]:  # Site unknown or not serving
             self.response({"error": "Unknown site"})
             return False
-        modified_files = {
-            inner_path: content["modified"]
-            for inner_path, content in site.content_manager.contents.iteritems()
-            if content["modified"] > params["since"]
-        }
+        modified_files = site.content_manager.listModified(params["since"])
 
         # Add peer to site if not added before
         connected_peer = site.addPeer(self.connection.ip, self.connection.port)