diff --git a/web/pdf_page_view.js b/web/pdf_page_view.js
index d236746c8..97ff9e84f 100644
--- a/web/pdf_page_view.js
+++ b/web/pdf_page_view.js
@@ -407,9 +407,7 @@ class PDFPageView {
         this.paintTask = null;
       }
 
-      if (((typeof PDFJSDev === 'undefined' ||
-            !PDFJSDev.test('PDFJS_NEXT')) && error === 'cancelled') ||
-          error instanceof RenderingCancelledException) {
+      if (error instanceof RenderingCancelledException) {
         this.error = null;
         return Promise.resolve(undefined);
       }
@@ -589,13 +587,8 @@ class PDFPageView {
     let cancelled = false;
     let ensureNotCancelled = () => {
       if (cancelled) {
-        if ((typeof PDFJSDev !== 'undefined' &&
-             PDFJSDev.test('PDFJS_NEXT')) || PDFJS.pdfjsNext) {
-          throw new RenderingCancelledException(
-            'Rendering cancelled, page ' + this.id, 'svg');
-        } else {
-          throw 'cancelled'; // eslint-disable-line no-throw-literal
-        }
+        throw new RenderingCancelledException(
+          'Rendering cancelled, page ' + this.id, 'svg');
       }
     };
 
diff --git a/web/pdf_thumbnail_view.js b/web/pdf_thumbnail_view.js
index 1c0c3a42f..4b995313f 100644
--- a/web/pdf_thumbnail_view.js
+++ b/web/pdf_thumbnail_view.js
@@ -303,9 +303,7 @@ class PDFThumbnailView {
         this.renderTask = null;
       }
 
-      if (((typeof PDFJSDev === 'undefined' ||
-            !PDFJSDev.test('PDFJS_NEXT')) && error === 'cancelled') ||
-          error instanceof RenderingCancelledException) {
+      if (error instanceof RenderingCancelledException) {
         renderCapability.resolve(undefined);
         return;
       }