diff --git a/lib/bcoin/coin.js b/lib/bcoin/coin.js
index 61c4ec76..383613ec 100644
--- a/lib/bcoin/coin.js
+++ b/lib/bcoin/coin.js
@@ -168,7 +168,7 @@ Coin.parseJSON = function parseJSON(json) {
     version: json.version,
     height: json.height,
     value: utils.satoshi(json.value),
-    script: bcoin.script.parseRaw(json.script, 'hex')),
+    script: bcoin.script.parseRaw(json.script, 'hex'),
     coinbase: json.coinbase,
     hash: json.hash ? utils.revHex(json.hash) : null,
     index: json.index
diff --git a/lib/bcoin/output.js b/lib/bcoin/output.js
index d9484802..7d247750 100644
--- a/lib/bcoin/output.js
+++ b/lib/bcoin/output.js
@@ -155,7 +155,7 @@ Output.prototype.toJSON = function toJSON() {
 Output.parseJSON = function parseJSON(json) {
   return {
     value: utils.satoshi(json.value),
-    script: bcoin.script.parseRaw(json.script, 'hex'))
+    script: bcoin.script.parseRaw(json.script, 'hex')
   };
 };
 
diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 4ec3178b..537b2df0 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -64,7 +64,7 @@ function Witness(items, mutable) {
 
   this.redeem = null;
 
-  assert(Array.isArray(items));
+  assert(Array.isArray(this.items));
 }
 
 /**
@@ -923,7 +923,7 @@ function Script(code, mutable) {
 
   this.redeem = null;
 
-  assert(Array.isArray(code));
+  assert(Array.isArray(this.code));
   assert(!this.raw || Buffer.isBuffer(this.raw));
 }