diff --git a/src/qtlibtorrent/qtorrenthandle.cpp b/src/qtlibtorrent/qtorrenthandle.cpp
index 6c192f860..c9c465ae7 100644
--- a/src/qtlibtorrent/qtorrenthandle.cpp
+++ b/src/qtlibtorrent/qtorrenthandle.cpp
@@ -420,6 +420,8 @@ QStringList QTorrentHandle::absolute_files_path_uneeded() const {
   QDir saveDir(save_path());
   QStringList res;
   std::vector<int> fp = torrent_handle::file_priorities();
+  qDebug() << fp.size() << num_files();
+  Q_ASSERT(fp.size() == num_files());
   for(int i = 0; i < num_files(); ++i) {
     if(fp[i] == 0) {
       const QString file_path = QDir::cleanPath(saveDir.absoluteFilePath(filepath_at(i)));
diff --git a/src/torrentfilesmodel.h b/src/torrentfilesmodel.h
index 3318887cb..aac58060c 100644
--- a/src/torrentfilesmodel.h
+++ b/src/torrentfilesmodel.h
@@ -360,7 +360,7 @@ public:
     emit dataChanged(index(0,0), index(rowCount(), columnCount()));
   }
 
-  void updateFilesPriorities(std::vector<int> fprio) {
+  void updateFilesPriorities(const std::vector<int> &fprio) {
     emit layoutAboutToBeChanged();
     for(unsigned int i=0; i<fprio.size(); ++i) {
       //qDebug("Called updateFilesPriorities with %d", fprio[i]);