diff --git a/lib/server/parse-udp.js b/lib/server/parse-udp.js
index a189ae5..da32beb 100644
--- a/lib/server/parse-udp.js
+++ b/lib/server/parse-udp.js
@@ -71,5 +71,5 @@ function fromUInt64 (buf) {
   var low = buf.readUInt32BE(4) | 0
   var lowUnsigned = (low >= 0) ? low : TWO_PWR_32 + low
 
-  return high * TWO_PWR_32 + lowUnsigned
+  return (high * TWO_PWR_32) + lowUnsigned
 }