diff --git a/data/pc/common/features.json b/data/pc/common/features.json
index 370b00980..651bfe325 100644
--- a/data/pc/common/features.json
+++ b/data/pc/common/features.json
@@ -380,6 +380,14 @@
       "latest"
     ]
   },
+  {
+    "name": "clientCommandUsesStringMapper",
+    "description": "client_command packet uses string mappings instead of numeric actionId",
+    "versions": [
+      "26.1",
+      "latest"
+    ]
+  },
   {
     "name": "entityCamelCase",
     "description": "entity names are in camel case",