diff --git a/Lib/modulefinder.py b/Lib/modulefinder.py
index da5b56d84c7..c0910aa8774 100644
--- a/Lib/modulefinder.py
+++ b/Lib/modulefinder.py
@@ -26,8 +26,7 @@
 
 # A Public interface
 def AddPackagePath(packagename, path):
-    paths = packagePathMap.setdefault(packagename, []).append(path)
-    packagePathMap[packagename] = paths
+    packagePathMap.setdefault(packagename, []).append(path)
 
 replacePackageMap = {}