diff --git a/web/app.js b/web/app.js
index ab58e0a29..a34449fe8 100644
--- a/web/app.js
+++ b/web/app.js
@@ -2424,9 +2424,9 @@ function webViewerHashchange(evt) {
   }
 }
 
-let webViewerFileInputChange, webViewerOpenFile;
 if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
-  webViewerFileInputChange = function (evt) {
+  // eslint-disable-next-line no-var
+  var webViewerFileInputChange = function (evt) {
     if (PDFViewerApplication.pdfViewer?.isInPresentationMode) {
       return; // Opening a new PDF file isn't supported in Presentation Mode.
     }
@@ -2439,7 +2439,8 @@ if (typeof PDFJSDev === "undefined" || PDFJSDev.test("GENERIC")) {
     PDFViewerApplication.open(url);
   };
 
-  webViewerOpenFile = function (evt) {
+  // eslint-disable-next-line no-var
+  var webViewerOpenFile = function (evt) {
     const fileInput = PDFViewerApplication.appConfig.openFileInput;
     fileInput.click();
   };