diff --git a/panoramapublic/src/org/labkey/panoramapublic/PanoramaPublicFileListener.java b/panoramapublic/src/org/labkey/panoramapublic/PanoramaPublicFileListener.java
index 4a63b650..51991fac 100644
--- a/panoramapublic/src/org/labkey/panoramapublic/PanoramaPublicFileListener.java
+++ b/panoramapublic/src/org/labkey/panoramapublic/PanoramaPublicFileListener.java
@@ -60,6 +60,6 @@ public Collection<File> listFiles(@Nullable Container container)
     @Override
     public SQLFragment listFilesQuery()
     {
-        throw new UnsupportedOperationException("Not implemented");
+        return null;
     }
 }