diff --git a/web/pdf_page_view.js b/web/pdf_page_view.js
index cac0ae619..aea372e07 100644
--- a/web/pdf_page_view.js
+++ b/web/pdf_page_view.js
@@ -831,7 +831,7 @@ class PDFPageView {
     renderTask.promise.then(
       function () {
         showCanvas();
-        renderCapability.resolve(undefined);
+        renderCapability.resolve();
       },
       function (error) {
         showCanvas();
diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index 74fc2eaeb..4b43d26f1 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -278,7 +278,7 @@ class PDFThumbnailView {
   draw() {
     if (this.renderingState !== RenderingStates.INITIAL) {
       console.error("Must be in new state before drawing");
-      return Promise.resolve(undefined);
+      return Promise.resolve();
     }
     const { pdfPage } = this;