diff --git a/packages/modules/commission/src/workflows/commission/steps/list-commission-lines.ts b/packages/modules/commission/src/workflows/commission/steps/list-commission-lines.ts
index 704560ec..2e256627 100644
--- a/packages/modules/commission/src/workflows/commission/steps/list-commission-lines.ts
+++ b/packages/modules/commission/src/workflows/commission/steps/list-commission-lines.ts
@@ -97,7 +97,7 @@ export const listCommissionLinesStep = createStep(
         return {
           ...line,
           order,
-          rule,
+          rule: rule ?? null
         };
       });