diff --git a/features.json b/features.json
index c0c9166..b2761ef 100644
--- a/features.json
+++ b/features.json
@@ -353,6 +353,7 @@
         "exceptions": "15.2",
         "extendedConst": "17.4",
         "gc": "18.2",
+        "jsStringBuiltins": "26.2",
         "multiValue": "13.1",
         "mutableGlobals": "13.1",
         "profiles": null,