diff --git a/lib/services/address/encoding.js b/lib/services/address/encoding.js
index 2f83faab..1f0933ad 100644
--- a/lib/services/address/encoding.js
+++ b/lib/services/address/encoding.js
@@ -161,7 +161,7 @@ exports.decodeInputValueMap = function(buffer) {
 };
 
 exports.encodeSummaryCacheKey = function(address) {
-  return Buffer.concat([address.hashBuffer, constants.HASH_TYPES_BUFFER[address.type]]);
+  return Buffer.concat([address.hashBuffer, constants.HASH_TYPES_MAP[address.type]]);
 };
 
 exports.decodeSummaryCacheKey = function(buffer, network) {