diff --git a/src/main/java/ome/services/ThumbnailBean.java b/src/main/java/ome/services/ThumbnailBean.java
index c96111bbf..8a872b21b 100644
--- a/src/main/java/ome/services/ThumbnailBean.java
+++ b/src/main/java/ome/services/ThumbnailBean.java
@@ -1138,7 +1138,7 @@ public byte[] getThumbnailWithoutDefault(Integer sizeX, Integer sizeY) {
     private byte[] retrieveThumbnailAndUpdateMetadata(boolean rewriteMetadata)
     {
         byte[] thumbnail = retrieveThumbnail(rewriteMetadata);
-        if (inProgress && !PROGRESS_VERSION.equals(thumbnailMetadata)) {
+        if (inProgress && !PROGRESS_VERSION.equals(thumbnailMetadata.getVersion())) {
             thumbnailMetadata.setVersion(PROGRESS_VERSION);
             dirtyMetadata = true;
         }