diff --git a/api/MessagePort.json b/api/MessagePort.json
index 57efc01c28ac50..dabedde56d26af 100644
--- a/api/MessagePort.json
+++ b/api/MessagePort.json
@@ -99,9 +99,7 @@
             "safari": {
               "version_added": "5"
             },
-            "safari_ios": {
-              "version_added": "5"
-            },
+            "safari_ios": "mirror",
             "samsunginternet_android": "mirror",
             "webview_android": {
               "version_added": "≤37"