diff --git a/serialization/src/main/kotlin/net/corda/serialization/internal/amqp/custom/OptionalSerializer.kt b/serialization/src/main/kotlin/net/corda/serialization/internal/amqp/custom/OptionalSerializer.kt
index 632cc4c511..2c2275af8c 100644
--- a/serialization/src/main/kotlin/net/corda/serialization/internal/amqp/custom/OptionalSerializer.kt
+++ b/serialization/src/main/kotlin/net/corda/serialization/internal/amqp/custom/OptionalSerializer.kt
@@ -7,7 +7,7 @@ import java.time.OffsetTime
 import java.util.*
 
 /**
- * A serializer for [OffsetTime] that uses a proxy object to write out the time and zone offset.
+ * A serializer for [Optional] that uses a proxy object to write out the value stored in the optional or [Optional.EMPTY].
  */
 class OptionalSerializer(factory: SerializerFactory) : CustomSerializer.Proxy<Optional<*>, OptionalSerializer.OptionalProxy>(Optional::class.java, OptionalProxy::class.java, factory) {