diff --git a/main.py b/main.py
index 33dad5d..d351b0a 100644
--- a/main.py
+++ b/main.py
@@ -146,7 +146,7 @@ def mx_records_handler(zone, records):
                 dns.rdataclass.IN,
                 dns.rdatatype.MX,
                 preference,
-                priority
+                exchange
             )
         )