diff --git a/src/printer.js b/src/printer.js
index 4b3609a466773c8d5405ed4382502813d9485cdd..21f6fe6585707e62397f00bcdcc99cbfd34fe3be 100644
--- a/src/printer.js
+++ b/src/printer.js
@@ -103,9 +103,8 @@ class Printer extends EventEmitter {
     }
 
     await page.evaluate(() => {
-      window.PagedConfig = {
-        auto: false
-      }
+      window.PagedConfig = window.PagedConfig || {};
+      window.PagedConfig.auto = false;
     });