diff --git a/pisi/atomicoperations.py b/pisi/atomicoperations.py
index 81913695..4e0ab72c 100644
--- a/pisi/atomicoperations.py
+++ b/pisi/atomicoperations.py
@@ -260,7 +260,9 @@ class Install(AtomicOperation):
 
         config_changed = []
         if self.reinstall:
-                    
+            new = set(map(lambda x: str(x.path), self.files.list))
+            old = set(map(lambda x: str(x.path), self.old_files.list))
+            
             # handle special cases for upgrades
             overlap = old & new
             self.files.list.sort(key=lambda x:x.path)