diff --git a/workflows/prefactor_calibrator.cwl b/workflows/prefactor_calibrator.cwl
index cad838d7989c19b9cefba2e859ee8acac6b2e236..e2b17f1d34fe80df04c7480a9a325f25c0980e30 100644
--- a/workflows/prefactor_calibrator.cwl
+++ b/workflows/prefactor_calibrator.cwl
@@ -41,6 +41,7 @@ inputs:
     'sbg:y': -713
   - id: propagate_solutions
     type: boolean
+    default: true
     'sbg:x': -112
     'sbg:y': -737
   - id: flagunconverged