diff --git a/pisi/packagedb.py b/pisi/packagedb.py
index 26991388..8ef4e8a6 100644
--- a/pisi/packagedb.py
+++ b/pisi/packagedb.py
@@ -118,7 +118,7 @@ class PackageDB(object):
                     self.dr.add_item(dep_name, [ (name, dep) ], repo, txn)
 
             if package_info.replaces:
-                self.mark_replaced_packages(self, package_info, repo, txn=None)
+                self.mark_replaced_packages(package_info, repo, txn=txn)
             
             # add component
             ctx.componentdb.add_package(package_info.partOf, package_info.name, repo, txn)