diff --git a/src/pdf.js b/src/pdf.js
index 1a551d300..1042a651b 100644
--- a/src/pdf.js
+++ b/src/pdf.js
@@ -7,7 +7,7 @@ var PDFJS = {};
   // Use strict in our context only - users might not want it
   'use strict';
 
-  PDFJS.build = "PDFJSSCRIPT_BUNDLE_VER";
+  PDFJS.build = 'PDFJSSCRIPT_BUNDLE_VER';
 
   // Files are inserted below - see Makefile
   /* PDFJSSCRIPT_INCLUDE_ALL */