diff --git a/picard.wdl b/picard.wdl
index bca4e9e5bdae7d5f7520934937b2a9c1001415cb..e88172f9a360b07d58cbc4274b49927a65020968 100644
--- a/picard.wdl
+++ b/picard.wdl
@@ -328,10 +328,8 @@ task MergeVCFs {
     }
 
     output {
-        IndexedVcfFile outputVcf = object {
-          file: outputVcfPath,
-          index: outputVcfPath + ".tbi"
-        }
+        File outputVcf = outputVcfPath
+        File outputVcfIndex = outputVcfPath + ".tbi"
     }
 
     runtime {