diff --git a/lib/script/script.js b/lib/script/script.js
index 45358717..b27fe203 100644
--- a/lib/script/script.js
+++ b/lib/script/script.js
@@ -834,7 +834,7 @@ Script.prototype.execute = function execute(stack, flags, tx, index, version) {
         break;
       }
       case opcodes.OP_CODESEPARATOR: {
-        lastSep = ip;
+        lastSep = ip + 1;
         break;
       }
       case opcodes.OP_CHECKSIG: