diff --git a/src/printer.js b/src/printer.js
index 5dd0bf6c796952124bab878afeb4b707f39088d6..906c28e6bd430ac2c3f11b3cd23b165eb9f8bbe1 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -91,9 +91,8 @@ class Printer extends EventEmitter {
     }
 
     await page.evaluate(() => {
-      window.PagedConfig = {
-        auto: false
-      }
+      window.PagedConfig = window.PagedConfig || {};
+      window.PagedConfig.auto = false;
     });