diff --git a/gulpfile.js b/gulpfile.js
index 120d4fdba..a850f717d 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -215,6 +215,12 @@ function createWebpackConfig(defines, output) {
           options: {
             presets: skipBabel ? undefined : ["@babel/preset-env"],
             plugins: [
+              [
+                "@babel/plugin-proposal-nullish-coalescing-operator",
+                {
+                  loose: true,
+                },
+              ],
               "@babel/plugin-transform-modules-commonjs",
               [
                 "@babel/plugin-transform-runtime",
diff --git a/package.json b/package.json
index c4cc931b1..6de76c459 100644
--- a/package.json
+++ b/package.json
@@ -3,6 +3,7 @@
   "version": "2.0.0",
   "devDependencies": {
     "@babel/core": "^7.10.1",
+    "@babel/plugin-proposal-nullish-coalescing-operator": "^7.10.1",
     "@babel/plugin-transform-modules-commonjs": "^7.10.1",
     "@babel/plugin-transform-runtime": "^7.10.1",
     "@babel/preset-env": "^7.10.1",
diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index 81b7c36d4..d18e9ca3f 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -448,7 +448,7 @@ class PDFThumbnailView {
   get _thumbPageTitle() {
     return this.l10n.get(
       "thumb_page_title",
-      { page: this.pageLabel !== null ? this.pageLabel : this.id },
+      { page: this.pageLabel ?? this.id },
       "Page {{page}}"
     );
   }
@@ -456,7 +456,7 @@ class PDFThumbnailView {
   get _thumbPageCanvas() {
     return this.l10n.get(
       "thumb_page_canvas",
-      { page: this.pageLabel !== null ? this.pageLabel : this.id },
+      { page: this.pageLabel ?? this.id },
       "Thumbnail of Page {{page}}"
     );
   }