diff --git a/pisi/packagedb.py b/pisi/packagedb.py
index da2b820d..02dd9ee9 100644
--- a/pisi/packagedb.py
+++ b/pisi/packagedb.py
@@ -163,8 +163,6 @@ def finalize_db():
 
     if inst_packagedb:
         inst_packagedb.close()
-        inst_packagedb = None
-
-    if packagedbs:
-        del packagedbs
-
+        inst_packagedb = None\
+    
+    packagedbs.clear()