diff --git a/dns_compare.py b/dns_compare.py
index f529e6f..c5fbb34 100755
--- a/dns_compare.py
+++ b/dns_compare.py
@@ -22,8 +22,7 @@ args = parser.parse_args()
 # Handle listing record types
 if args.list_record_types:
     print("Supported DNS record types:")
-    for rtype in supported_types:
-        print(f"  {rtype}")
+    print((", ").join(supported_types))
     exit(0)
 
 # Convert record type string to dns.rdatatype constant