diff --git a/packages/core/src/index.js b/packages/core/src/index.js
index f7c8073..eb685a8 100644
--- a/packages/core/src/index.js
+++ b/packages/core/src/index.js
@@ -50,7 +50,7 @@ module.exports.bootModule = Ground.bootModule;
 
 // These aren't so much "Universal" as they are "VM-wide-unique".
 let uuidIndex = 0;
-let uuidPrefix = '__@syndicate__' + RandomID.randomId(8) + '_';
-module.exports.genUuid = function () {
-  return uuidPrefix + uuidIndex++;
+let uuidPrefix = '__@syndicate__' + RandomID.randomId(8);
+module.exports.genUuid = function (prefix) {
+  return (prefix || uuidPrefix) + '_' + uuidIndex++;
 };