diff --git a/front/src/api.js b/front/src/api.js
index a1db6fa..aac0c21 100644
--- a/front/src/api.js
+++ b/front/src/api.js
@@ -130,7 +130,7 @@ export function postCollection(collection) {
   return genericPayloadCall('/ws/collection', collection, 'POST')
 }
 
-export function postCollectionAddBook(collectionId, position) {
+export function postCollectionAddBook(collectionId, bookId) {
   return genericPayloadCall(
     '/ws/collection/' + collectionId + '/addbook',
     { bookId: bookId },