diff --git a/web/app.js b/web/app.js
index ff7e5d912..784aa1537 100644
--- a/web/app.js
+++ b/web/app.js
@@ -1790,19 +1790,18 @@ function webViewerUpdateViewarea(evt) {
 }
 
 function webViewerResize() {
-  let currentScaleValue = PDFViewerApplication.pdfViewer.currentScaleValue;
+  let { pdfDocument, pdfViewer, } = PDFViewerApplication;
+  if (!pdfDocument) {
+    return;
+  }
+  let currentScaleValue = pdfViewer.currentScaleValue;
   if (currentScaleValue === 'auto' ||
       currentScaleValue === 'page-fit' ||
       currentScaleValue === 'page-width') {
     // Note: the scale is constant for 'page-actual'.
-    PDFViewerApplication.pdfViewer.currentScaleValue = currentScaleValue;
-  } else if (!currentScaleValue) {
-    // Normally this shouldn't happen, but if the scale wasn't initialized
-    // we set it to the default value in order to prevent any issues.
-    // (E.g. the document being rendered with the wrong scale on load.)
-    PDFViewerApplication.pdfViewer.currentScaleValue = DEFAULT_SCALE_VALUE;
+    pdfViewer.currentScaleValue = currentScaleValue;
   }
-  PDFViewerApplication.pdfViewer.update();
+  pdfViewer.update();
 }
 
 function webViewerHashchange(evt) {