diff --git a/lib/bcoin/script.js b/lib/bcoin/script.js
index 045c73f3..961e14a7 100644
--- a/lib/bcoin/script.js
+++ b/lib/bcoin/script.js
@@ -176,6 +176,17 @@ script.execute = function execute(s, stack, tx, index) {
     }
 
     switch (o) {
+      case 'nop1':
+      case 'nop3':
+      case 'nop4':
+      case 'nop5':
+      case 'nop6':
+      case 'nop7':
+      case 'nop8':
+      case 'nop9':
+      case 'nop10': {
+        break;
+      }
       case 'if_':
       case 'notif': {
         var val = false;
@@ -217,26 +228,6 @@ script.execute = function execute(s, stack, tx, index) {
       case 'endif': {
         return false;
       }
-      case 'nop1':
-      case 'nop3':
-      case 'nop4':
-      case 'nop5':
-      case 'nop6':
-      case 'nop7':
-      case 'nop8':
-      case 'nop9':
-      case 'nop10': {
-        // OP_EVAL
-        // if (o === 'nop1') {
-        //   var evalScript = script.decode(stack.pop());
-        //   if (!Array.isArray(evalScript))
-        //     return false;
-        //   var res = script.execute(evalScript, stack, tx, index);
-        //   if (!res)
-        //     return false;
-        // }
-        break;
-      }
       case 'verify': {
         if (stack.length === 0)
           return false;
@@ -670,6 +661,7 @@ script.execute = function execute(s, stack, tx, index) {
         break;
       }
       case 'checklocktimeverify': {
+        // OP_CHECKLOCKTIMEVERIFY = OP_NOP2
         // input: [[], sig1, sig2, 1]
         // prev_out: [[lock], 'checklocktimeverify', 'drop',
         //            'dup', 'hash160', pubkey, 'equalverify', 'checksig']
@@ -697,6 +689,17 @@ script.execute = function execute(s, stack, tx, index) {
 
         break;
       }
+      case 'eval_': {
+        // OP_EVAL = OP_NOP1
+        // var evalScript = script.decode(stack.pop());
+        // if (!Array.isArray(evalScript))
+        //   return false;
+        // var res = script.execute(evalScript, stack, tx, index);
+        // if (!res)
+        //   return false;
+        // break;
+        return false;
+      }
       default: {
         // Unknown operation
         return false;