diff --git a/source/framework/12.x/framework.json b/source/framework/12.x/framework.json
index 0240369a30c..afce96a2e6b 100644
--- a/source/framework/12.x/framework.json
+++ b/source/framework/12.x/framework.json
@@ -13,6 +13,7 @@
     "If you did not request a password reset, no further action is required.": "If you did not request a password reset, no further action is required.",
     "Invalid filename.": "Invalid filename.",
     "Invalid JSON was returned from the route.": "Invalid JSON was returned from the route.",
+    "length": "length",
     "Location": "Location",
     "Login": "Login",
     "Logout": "Logout",