diff --git a/src/actions.js b/src/actions.js
index f6f5ec9..6348144 100644
--- a/src/actions.js
+++ b/src/actions.js
@@ -176,7 +176,7 @@ export function updateTask(task, clientMutationLabel) {
   );
 }
 
-export function resolveTask(task, clientMutationLabel, user, approveOrFail, additionalData) {
+export function resolveTask(task, clientMutationLabel, user, approveOrFail, additionalData = null) {
   return PERFORM_MUTATION(
     MUTATION_SERVICE.TASK.RESOLVE,
     formatTaskResolveGQL(task, user, approveOrFail, additionalData),
diff --git a/src/pages/TaskDetailsPage.js b/src/pages/TaskDetailsPage.js
index e1f9f7d..ee155e2 100644
--- a/src/pages/TaskDetailsPage.js
+++ b/src/pages/TaskDetailsPage.js
@@ -36,7 +36,7 @@ function TaskDetailsPage({
   const history = useHistory();
   const { formatMessage } = useTranslations('tasksManagement', modulesManager);
   const [editedTask, setEditedTask] = useState({});
-  const [additionalData, setAdditionalData] = useState({});
+  const [additionalData, setAdditionalData] = useState(null);
   const submittingMutationRef = useRef();
   const back = () => history.goBack();