diff --git a/src/main/java/org/sagebionetworks/web/client/widget/entity/download/UploaderViewImpl.java b/src/main/java/org/sagebionetworks/web/client/widget/entity/download/UploaderViewImpl.java
index 2634844a49..ae71eee5b5 100644
--- a/src/main/java/org/sagebionetworks/web/client/widget/entity/download/UploaderViewImpl.java
+++ b/src/main/java/org/sagebionetworks/web/client/widget/entity/download/UploaderViewImpl.java
@@ -140,6 +140,8 @@ public UploaderViewImpl(
 
     this.progressContainer = new Progress();
     progressContainer.setMarginTop(10);
+    // striped and animated (helps to indicate that the upload may not be stuck)
+    progressContainer.addStyleName("progress-striped active");
     this.progressBar = new ProgressBar();
     progressBar.setType(ProgressBarType.INFO);
     progressContainer.add(progressBar);