diff --git a/steps/interpolate_visibilities.cwl b/steps/interpolate_visibilities.cwl
index 086cbaf9c4ef74f59fb77e2cd188596a70acb038..e05e6f4945ad6f5807670e35dd69d8d24a53ac91 100644
--- a/steps/interpolate_visibilities.cwl
+++ b/steps/interpolate_visibilities.cwl
@@ -8,6 +8,7 @@ baseCommand:
   - DPPP
 arguments:
   - msout.datacolumn=INTERP_DATA
+  - msout=.
   - msin.datacolumn=DATA
   - steps=[interpolate]
 inputs: