diff --git a/anaconda/pyanaconda/packaging/__init__.py b/anaconda/pyanaconda/packaging/__init__.py
index 8332ce0..26eb953 100644
--- a/anaconda/pyanaconda/packaging/__init__.py
+++ b/anaconda/pyanaconda/packaging/__init__.py
@@ -829,7 +829,7 @@ class PackagePayload(Payload):
                 if fnmatch(f, "/boot/vmlinuz-*") or
                    fnmatch(f, "/boot/efi/EFI/%s/vmlinuz-*" % self.instclass.efi_dir)))
 
-        return sorted(files, key=functools.cmp_to_key(versionCmp))
+        return sorted(set(files), key=functools.cmp_to_key(versionCmp))
 
     @property
     def rpmMacros(self):