diff --git a/openlp/plugins/songs/lib/olpimport.py b/openlp/plugins/songs/lib/olpimport.py
index d7a735033..598815c8f 100644
--- a/openlp/plugins/songs/lib/olpimport.py
+++ b/openlp/plugins/songs/lib/olpimport.py
@@ -145,6 +145,7 @@ class OpenLPSongImport(SongImport):
             else:
                 song_props['media_files'] = relation(OldMediaFile,
                     backref='songs',
+                    foreign_keys=[source_media_files_table.c.song_id],
                     primaryjoin=source_songs_table.c.id == \
                         source_media_files_table.c.song_id)
         try: