diff --git a/datasets/datasets.js b/datasets/datasets.js
index 7efcab036e93f4f8441aab77699f00206edfed95..b2bbde0e2e098e5ca17331884626aed6efa73e66 100644
--- a/datasets/datasets.js
+++ b/datasets/datasets.js
@@ -17,6 +17,7 @@ export function loadGraphJson(spaceId) {
 /**
  * Takes the graph json object and stores it in the backend.
  *
+ * @param {String} spaceId Identification of graph to save.
  * @param {object} json Graph object
  */
 export function saveGraphJson(spaceId, json) {