diff --git a/subworkflow/ndppp_prep_cal.cwl b/subworkflow/ndppp_prep_cal.cwl
index 6d5daadb45e3c1f33eec62801dcaa3a19515e426..d0f9936ffed3b7034f1e7450ae323da227f98148 100644
--- a/subworkflow/ndppp_prep_cal.cwl
+++ b/subworkflow/ndppp_prep_cal.cwl
@@ -36,7 +36,9 @@ inputs:
     type: Directory
     'sbg:x': 2339.69921875
     'sbg:y': 114.51534271240234
-outputs: []
+outputs:
+  - id: msout
+    type: Directory
 steps:
   - id: flagbaseline
     in: