diff --git a/slpkg/slack/patches.py b/slpkg/slack/patches.py
index f879713e..4a736e8c 100644
--- a/slpkg/slack/patches.py
+++ b/slpkg/slack/patches.py
@@ -178,6 +178,7 @@ class Patches(object):
                 self.comp_sum.pop(index)
                 self.uncomp_sum.pop(index)
                 self.count_upg -= 1
+                del comp, uncomp
                 index -= 1
             index += 1
         if not self.upgrade_all: