diff --git a/src/script.js b/src/script.js
index f0d6757..700b7ff 100644
--- a/src/script.js
+++ b/src/script.js
@@ -32,7 +32,7 @@ Script.fromBuffer = function(buffer) {
     } else {
       chunks.push(opcode)
 
-      ++i
+      i += 1
     }
   }