diff --git a/lightning-address.py b/lightning-address.py
index 8c0d7fa..5a5d2c7 100755
--- a/lightning-address.py
+++ b/lightning-address.py
@@ -78,8 +78,8 @@ def tags_by_name(name, tags):
     if expiry:
         print("Expiry (seconds):", expiry[0])
 
-    for t in [t for t in a.tags if t[0] not in 'rdfhx']:
-        print("UNKNOWN TAG {}: {}".format(t[0], hexlify(t[1])))
+    for t in [t for t in a.unknown_tags]:
+        print("UNKNOWN TAG {}: {}".format(t[0], hexlify(t[1].tobytes())))
 
 parser = argparse.ArgumentParser(description='Encode lightning address')
 subparsers = parser.add_subparsers(dest='subparser_name',