diff --git a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/grouping/GroupKey.java b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/grouping/GroupKey.java
index ae2d2361e6..00d3c3d728 100644
--- a/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/grouping/GroupKey.java
+++ b/ImageGallery/src/org/sleuthkit/autopsy/imagegallery/datamodel/grouping/GroupKey.java
@@ -74,7 +74,8 @@ public class GroupKey<T extends Comparable<T>> implements Comparable<GroupKey<T>
 
         hash = 79 * hash + Objects.hashCode(this.val);
         hash = 79 * hash + Objects.hashCode(this.attr);
-        hash = 79 * hash + (int)this.dataSource.getId(); 
+        if (this.dataSource != null) 
+            hash = 79 * hash + (int)this.dataSource.getId(); 
 
         return hash;
     }