diff --git a/runtime/js/core/browser.js b/runtime/js/core/browser.js
index ccbe9f284..dd7856897 100644
--- a/runtime/js/core/browser.js
+++ b/runtime/js/core/browser.js
@@ -26,7 +26,7 @@ export function OpenURL(url) {
  * Opens the given filename using the system's default file handler
  *
  * @export
- * @param {sting} filename
+ * @param {string} filename
  * @returns
  */
 export function OpenFile(filename) {
diff --git a/runtime/js/core/calls.js b/runtime/js/core/calls.js
index ea3128e8a..9919ff803 100644
--- a/runtime/js/core/calls.js
+++ b/runtime/js/core/calls.js
@@ -62,7 +62,7 @@ if (window.crypto) {
 export function Call(bindingName, data, timeout) {
 
 	// Timeout infinite by default
-	if (timeout == null || timeout == undefined) {
+	if (timeout == null) {
 		timeout = 0;
 	}
 
diff --git a/runtime/js/core/ipc.js b/runtime/js/core/ipc.js
index 1285255a7..b453d3ac7 100644
--- a/runtime/js/core/ipc.js
+++ b/runtime/js/core/ipc.js
@@ -45,7 +45,7 @@ function Invoke(message) {
  *
  * @export
  * @param {string} type
- * @param {string} payload
+ * @param {Object} payload
  * @param {string=} callbackID
  */
 export function SendMessage(type, payload, callbackID) {