diff --git a/dns.rdata.parse.js b/dns.rdata.parse.js
index 5defe27..1f8caf4 100644
--- a/dns.rdata.parse.js
+++ b/dns.rdata.parse.js
@@ -39,8 +39,10 @@ exports.DNS_RDATA_PARSE = function (ab, packet, record) {
 
   // NOTE: record will be modified
   // Things that get added include:
-  // address, data, priority exchange, weight,  
-  return parser(ab, packet, record);
+  // address, data, priority exchange, weight,
+  // NOTE: this slicing is a shim so that we don't have to pass rdend to unpackLabel
+  // (because `undefined` and 0x00 are functionally equivalent)
+  return parser(ab.slice(0, record.rdstart + record.rdlength), packet, record);
 };
 
 }('undefined' !== typeof window ? window : exports));