diff --git a/lib/browser/api/web-contents.js b/lib/browser/api/web-contents.js
index c49c1be8ba64..1ea5b15599b3 100644
--- a/lib/browser/api/web-contents.js
+++ b/lib/browser/api/web-contents.js
@@ -198,8 +198,8 @@ WebContents.prototype.printToPDF = function (options, callback) {
       printingSetting.mediaSize = {
         name: 'CUSTOM',
         custom_display_name: 'Custom',
-        height_microns: pageSize.height,
-        width_microns: pageSize.width
+        height_microns: Math.ceil(pageSize.height),
+        width_microns: Math.ceil(pageSize.width)
       }
     } else if (PDFPageSizes[pageSize]) {
       printingSetting.mediaSize = PDFPageSizes[pageSize]