diff --git a/client/jackson/src/main/kotlin/net/corda/jackson/JacksonSupport.kt b/client/jackson/src/main/kotlin/net/corda/jackson/JacksonSupport.kt
index 2a0b0d7122..e3d060a1fa 100644
--- a/client/jackson/src/main/kotlin/net/corda/jackson/JacksonSupport.kt
+++ b/client/jackson/src/main/kotlin/net/corda/jackson/JacksonSupport.kt
@@ -125,7 +125,6 @@ object JacksonSupport {
                 parser.nextToken()
             }
 
-            val mapper = parser.codec as PartyObjectMapper
             // TODO this needs to use some industry identifier(s) instead of these keys
             val key = CompositeKey.parseFromBase58(parser.text)
             return AnonymousParty(key)