diff --git a/modules/API/external/external_api.js b/modules/API/external/external_api.js
index f43fc4080..70476f7a3 100644
--- a/modules/API/external/external_api.js
+++ b/modules/API/external/external_api.js
@@ -170,7 +170,7 @@ function parseArguments(args) {
 
     switch (typeof firstArg) {
     case 'string': // old arguments format
-    case undefined: {
+    case 'undefined': {
         // Not sure which format but we are trying to parse the old
         // format because if the new format is used everything will be undefined
         // anyway.
diff --git a/react/features/mobile/watchos/middleware.js b/react/features/mobile/watchos/middleware.js
index 75c5d61f8..be604078c 100644
--- a/react/features/mobile/watchos/middleware.js
+++ b/react/features/mobile/watchos/middleware.js
@@ -98,7 +98,7 @@ function _appWillMount({ dispatch, getState }) {
 
         switch (command) {
         case CMD_HANG_UP:
-            if (typeof getCurrentConferenceUrl(getState()) !== undefined) {
+            if (typeof getCurrentConferenceUrl(getState()) !== 'undefined') {
                 dispatch(appNavigate(undefined));
             }
             break;