diff --git a/src/pylorax/installtree.py b/src/pylorax/installtree.py
index e6a5822a..96748901 100644
--- a/src/pylorax/installtree.py
+++ b/src/pylorax/installtree.py
@@ -535,8 +535,7 @@ class LoraxInstallTree(BaseLoraxClass):
             compressed = gzip.open(initrd.fpath, "wb")
         elif type == "xz":
             compressed = lzma.LZMAFile(initrd.fpath, "w",
-                    options={"format":"xz", "check":"crc32",
-                             "level":9})
+                    options={"format":"xz", "level":9})
 
         compressed.write(cpio.stdout.read())
         compressed.close()