diff --git a/features.txt b/features.txt
index a398ae2e15..de9b10f44b 100644
--- a/features.txt
+++ b/features.txt
@@ -100,6 +100,10 @@ Array.fromAsync
 String.prototype.isWellFormed
 String.prototype.toWellFormed
 
+# JSON.parse with source
+# https://github.com/tc39/proposal-json-parse-with-source
+json-parse-with-source
+
 ## Standard language features
 #
 # Language features that have been included in a published version of the