diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index f5c3399d..e40c3d0b 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -1150,7 +1150,7 @@ script.format = function(input, output) {
       if (Array.isArray(chunk)) {
         if (chunk.length === 0)
           return 0 + '';
-        return utils.toHex(chunk);
+        return '[' + utils.toHex(chunk) + ']';
       }
       if (typeof chunk === 'number')
         return chunk + '';