diff --git a/debugger/util/argument_parser.js b/debugger/util/argument_parser.js
index 10ca91b..2045a6c 100644
--- a/debugger/util/argument_parser.js
+++ b/debugger/util/argument_parser.js
@@ -8,6 +8,7 @@ const {
   StringPrototypeIndexOf,
   StringPrototypeSlice,
   ArrayPrototypeJoin,
+  Number
 } = primordials;
 
 const {