diff --git a/src/obj.js b/src/obj.js
index df09d3630..d3f2df96c 100644
--- a/src/obj.js
+++ b/src/obj.js
@@ -1,5 +1,6 @@
 /* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
 /* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* globals assertWellFormed, bytesToString, CipherTransformFactory, error, info, InvalidPDFException, isArray, isCmd, isDict, isInt, isName, isRef, isStream, JpegStream, Lexer, log, Page, Parser, Promise, shadow, stringToPDFString, stringToUTF8String, warn */
 /* Copyright 2012 Mozilla Foundation
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -100,7 +101,7 @@ var Dict = (function DictClosure() {
         callback(key, this.get(key));
       }
     };
-  };
+  }
 
   return Dict;
 })();
@@ -442,7 +443,7 @@ var XRef = (function XRefClosure() {
           for (j = 0; j < typeFieldWidth; ++j)
             type = (type << 8) | stream.getByte();
           // if type field is absent, its default value = 1
-          if (typeFieldWidth == 0)
+          if (typeFieldWidth === 0)
             type = 1;
           for (j = 0; j < offsetFieldWidth; ++j)
             offset = (offset << 8) | stream.getByte();
@@ -678,7 +679,7 @@ var XRef = (function XRefClosure() {
         }
         if (!isCmd(obj3, 'obj')) {
           // some bad pdfs use "obj1234" and really mean 1234
-          if (obj3.cmd.indexOf('obj') == 0) {
+          if (obj3.cmd.indexOf('obj') === 0) {
             num = parseInt(obj3.cmd.substring(3), 10);
             if (!isNaN(num))
               return num;