diff --git a/react/features/mobile/external-api/middleware.js b/react/features/mobile/external-api/middleware.js
index 05bdc3958..99ba76507 100644
--- a/react/features/mobile/external-api/middleware.js
+++ b/react/features/mobile/external-api/middleware.js
@@ -83,7 +83,7 @@ function _toErrorString(
         error
             ? typeof error === 'string'
                 ? error
-                : Error.prototype.toString(error)
+                : Error.prototype.toString.apply(error)
             : '');
 }