diff --git a/pisi/util.py b/pisi/util.py
index fc1f7bc7..d1953019 100644
--- a/pisi/util.py
+++ b/pisi/util.py
@@ -18,6 +18,9 @@ class UtilError(Exception):
 
 # string/list functions
 
+def unzip(seq):
+    return zip(*seq)
+
 def concat(l):
     """concatenate a list of lists"""
     return reduce( lambda x,y: x+y, l )