diff --git a/constants.properties b/constants.properties
index 40ad93506a..51b52f9e68 100644
--- a/constants.properties
+++ b/constants.properties
@@ -2,7 +2,7 @@
 # because some versions here need to be matched by app authors in
 # their own projects. So don't get fancy with syntax!
 
-cordaVersion=4.8.5.21-CONCLAVE-SNAPSHOT
+cordaVersion=4.8.5.22-CONCLAVE-SNAPSHOT
 versionSuffix=
 gradlePluginsVersion=5.0.12
 kotlinVersion=1.2.71
diff --git a/core/src/main/kotlin/net/corda/core/transactions/SignedTransaction.kt b/core/src/main/kotlin/net/corda/core/transactions/SignedTransaction.kt
index 4026a6cca3..41adc0a8b7 100644
--- a/core/src/main/kotlin/net/corda/core/transactions/SignedTransaction.kt
+++ b/core/src/main/kotlin/net/corda/core/transactions/SignedTransaction.kt
@@ -198,8 +198,7 @@ constructor(val txBits: SerializedBytes<CoreTransaction>, override val sigs: Lis
         val groupedInputsAndRefs = (inputs + references).groupBy { it.txhash }
         groupedInputsAndRefs.map { entry ->
             val tx = services.validatedTransactions.getTransaction(entry.key)?.coreTransaction
-                    ?: throw TransactionResolutionException(id)
-            val paramHash = tx.networkParametersHash ?: services.networkParametersService.defaultHash
+            val paramHash = tx?.networkParametersHash ?: services.networkParametersService.defaultHash
             val params = services.networkParametersService.lookup(paramHash) ?: throw TransactionResolutionException(id)
             if (txNetworkParameters.epoch < params.epoch)
                 throw TransactionVerificationException.TransactionNetworkParameterOrderingException(id, entry.value.first(), txNetworkParameters, params)