diff --git a/opkg.py b/opkg.py
index ddb2c38..23fed96 100644
--- a/opkg.py
+++ b/opkg.py
@@ -408,8 +408,12 @@ class Package(object):
             return []
         f = open(self.fn, "rb")
         ar = arfile.ArFile(f, self.fn)
-        tarStream = ar.open("data.tar.gz")
-        tarf = tarfile.open("data.tar.gz", "r", tarStream)
+        try:
+            tarStream = ar.open("data.tar.gz")
+            tarf = tarfile.open("data.tar.gz", "r", tarStream)
+        except IOError:
+            tarStream = ar.open("data.tar.xz")
+            tarf = tarfile.open("data.tar.xz", "r:xz", tarStream)
         self.file_list = tarf.getnames()
         self.file_list = [["./", ""][a.startswith("./")] + a for a in self.file_list]