diff --git a/steps/applycal.cwl b/steps/applycal.cwl
index 94992bad4a24a1cedca05868e6fb1a3757d4419b..4c51279bb877ec37f56cdacfdc1f0ced8e950692 100644
--- a/steps/applycal.cwl
+++ b/steps/applycal.cwl
@@ -30,6 +30,12 @@ inputs:
     inputBinding:
       prefix: applycal.parmdb=
       separate: false
+  - id: msout_datacolumn
+    type: string
+    doc: Output data column
+    inputBinding:
+      prefix: msout.datacolumn=
+      separate: false
   - id: correction
     default: gain
     type: string