diff --git a/morituri/rip/cd.py b/morituri/rip/cd.py
index a082976..1903252 100644
--- a/morituri/rip/cd.py
+++ b/morituri/rip/cd.py
@@ -137,7 +137,9 @@ See  http://sourceforge.net/tracker/?func=detail&aid=604751&group_id=2171&atid=1
 
         prog.metadata = prog.getMusicBrainz(ittoc, mbdiscid)
 
+        # stop if the cd is unknown and we don't want to continue
         if not prog.metadata and not self.options.unknown:
+            prog.ejectDevice(device)
             return -1
 
         # now, read the complete index table, which is slower