diff --git a/morituri/image/toc.py b/morituri/image/toc.py
index e0b4656..9cc0c89 100644
--- a/morituri/image/toc.py
+++ b/morituri/image/toc.py
@@ -200,7 +200,7 @@ class TocFile(object, log.Loggable):
                     # FIXME: why not set absolute offsets too ?
                     currentTrack.index(1, path=currentFile.path,
                         absolute=absoluteOffset + pregapLength,
-                        relative=relativeOffset + pregapLength,
+                        relative=currentFile.start + pregapLength,
                         counter=counter)
                     self.debug(
                         '[track %02d index 01] pregapLength %r, added %r',
@@ -339,7 +339,7 @@ class TocFile(object, log.Loggable):
         if currentTrack:
             currentTrack.index(1, path=currentFile.path,
                 absolute=absoluteOffset + pregapLength,
-                relative=relativeOffset + pregapLength, counter=counter)
+                relative=currentFile.start, counter=counter)
             self.debug('[track %02d index 01] last track, added %r',
                 currentTrack.number, currentTrack.getIndex(1))