diff --git a/pisi/api.py b/pisi/api.py
index ebabf73c..b3c19843 100644
--- a/pisi/api.py
+++ b/pisi/api.py
@@ -780,7 +780,6 @@ def build(*args, **kw):
 def clearCache(all=False):
 
     import glob
-    from sets import Set as set
 
     def getPackageLists(pkgList):
         latest = {}
diff --git a/pisi/cli/check.py b/pisi/cli/check.py
index f88c7048..958b0c22 100644
--- a/pisi/cli/check.py
+++ b/pisi/cli/check.py
@@ -57,7 +57,6 @@ If no packages are given, checks all installed packages.
         component = ctx.get_option('component')
         if component:
             #FIXME: pisi api is insufficient to do this
-            from sets import Set as set
             installed = pisi.api.list_installed()
             component_pkgs = self.componentdb.get_union_packages(component, walk=True)
             pkgs = list(set(installed) & set(component_pkgs))
diff --git a/pisi/cli/listinstalled.py b/pisi/cli/listinstalled.py
index 0d2c52e0..0288ee5f 100644
--- a/pisi/cli/listinstalled.py
+++ b/pisi/cli/listinstalled.py
@@ -62,7 +62,6 @@ Usage: list-installed
         component = ctx.get_option('component')
         if component:
             #FIXME: pisi api is insufficient to do this
-            from sets import Set as set
             component_pkgs = self.componentdb.get_union_packages(component, walk=True)
             installed = list(set(installed) & set(component_pkgs))
 
diff --git a/pisi/cli/listupgrades.py b/pisi/cli/listupgrades.py
index 753cd519..c844955f 100644
--- a/pisi/cli/listupgrades.py
+++ b/pisi/cli/listupgrades.py
@@ -59,7 +59,6 @@ Lists the packages that will be upgraded.
         component = ctx.get_option('component')
         if component:
             #FIXME: PiSi api is insufficient to do this
-            from sets import Set as set
             component_pkgs = self.componentdb.get_union_packages(component, walk=True)
             upgradable_pkgs = list(set(upgradable_pkgs) & set(component_pkgs))
 
diff --git a/pisi/operations/delta.py b/pisi/operations/delta.py
index d705de2a..c6dc98e4 100644
--- a/pisi/operations/delta.py
+++ b/pisi/operations/delta.py
@@ -10,7 +10,6 @@
 # Please read the COPYING file.
 
 import os
-import sets
 
 import gettext
 __trans = gettext.translation("pisi", fallback=True)
@@ -105,8 +104,8 @@ def find_delta(oldfiles, newfiles):
     for f in newfiles.list:
         hashto_files.setdefault(f.hash, []).append(f)
 
-    files_new = sets.Set(map(lambda x:x.hash, newfiles.list))
-    files_old = sets.Set(map(lambda x:x.hash, oldfiles.list))
+    files_new = set(map(lambda x:x.hash, newfiles.list))
+    files_old = set(map(lambda x:x.hash, oldfiles.list))
     files_delta = files_new - files_old
 
     deltas = []