diff --git a/modules/ecashaddrjs/src/cashaddr.js b/modules/ecashaddrjs/src/cashaddr.js
--- a/modules/ecashaddrjs/src/cashaddr.js
+++ b/modules/ecashaddrjs/src/cashaddr.js
@@ -142,6 +142,7 @@
     'simpleledger',
     'etoken',
     'ectest',
+    'ecregtest',
     'bchtest',
     'bchreg',
 ];