diff --git a/packages/ripple-binary-codec/src/enums/definitions.json b/packages/ripple-binary-codec/src/enums/definitions.json
index ce449a51..cc0fc1d0 100644
--- a/packages/ripple-binary-codec/src/enums/definitions.json
+++ b/packages/ripple-binary-codec/src/enums/definitions.json
@@ -44,7 +44,7 @@
     "NegativeUNL": 78,
     "NFTokenPage": 80,
     "NFTokenOffer": 55,
-    "Amm": 121,
+    "AMM": 121,
     "Any": -3,
     "Child": -2,
     "Nickname": 110,