diff --git a/include/xrpl/protocol/HashPrefix.h b/include/xrpl/protocol/HashPrefix.h
index 016f7cb66b..39e03bf94f 100644
--- a/include/xrpl/protocol/HashPrefix.h
+++ b/include/xrpl/protocol/HashPrefix.h
@@ -69,9 +69,6 @@ enum class HashPrefix : std::uint32_t {
 
     /** Batch */
     batch = detail::make_hash_prefix('B', 'C', 'H'),
-
-    /** Sponsor */
-    sponsor = detail::make_hash_prefix('S', 'P', 'N'),
 };
 
 template <class Hasher>