diff --git a/backend/src/graphql/resolver/ContributionResolver.ts b/backend/src/graphql/resolver/ContributionResolver.ts
index 728079bab..6a5240cd1 100644
--- a/backend/src/graphql/resolver/ContributionResolver.ts
+++ b/backend/src/graphql/resolver/ContributionResolver.ts
@@ -180,13 +180,13 @@ export class ContributionResolver {
     @Args()
     { currentPage = 1, pageSize = 5, order = Order.DESC }: Paginated,
     @Arg('statusFilter', () => [ContributionStatus], { nullable: true })
-    statusFilters: ContributionStatus[] | null,
+    statusFilters?: ContributionStatus[],
   ): Promise<ContributionListResult> {
     const where: {
       contributionStatus?: FindOperator<string> | null
     } = {}
 
-    if (statusFilters !== null && statusFilters.length) {
+    if (statusFilters && statusFilters.length) {
       where.contributionStatus = In(statusFilters)
     }