diff --git a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
index eaa43cf..3175ba8 100644
--- a/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
+++ b/quickstep/src/com/android/quickstep/TaskThumbnailCache.java
@@ -134,7 +134,8 @@
         Preconditions.assertUIThread();
 
         boolean lowResolution = !mHighResLoadingState.isEnabled();
-        if (task.thumbnail != null && (!task.thumbnail.reducedResolution || lowResolution)) {
+        if (task.thumbnail != null && task.thumbnail.thumbnail != null
+                && (!task.thumbnail.reducedResolution || lowResolution)) {
             // Nothing to load, the thumbnail is already high-resolution or matches what the
             // request, so just callback
             callback.accept(task.thumbnail);
@@ -152,7 +153,8 @@
         Preconditions.assertUIThread();
 
         ThumbnailData cachedThumbnail = mCache.getAndInvalidateIfModified(key);
-        if (cachedThumbnail != null && (!cachedThumbnail.reducedResolution || lowResolution)) {
+        if (cachedThumbnail != null &&  cachedThumbnail.thumbnail != null
+                && (!cachedThumbnail.reducedResolution || lowResolution)) {
             // Already cached, lets use that thumbnail
             callback.accept(cachedThumbnail);
             return null;