diff --git a/src/pyff/mdrepo.py b/src/pyff/mdrepo.py
index 7e191082..f29ac9b9 100644
--- a/src/pyff/mdrepo.py
+++ b/src/pyff/mdrepo.py
@@ -825,7 +825,7 @@ def _lookup(self, member):
 
         log.debug("calling store lookup %s" % member)
         return self.store.lookup(member)
-
+#        This is a harmless comment line
 
     def lookup(self, member, xp=None):
         """