diff --git a/src/main/kotlin/com/r3corda/demos/TraderDemo.kt b/src/main/kotlin/com/r3corda/demos/TraderDemo.kt
index d0c8b158d9..20fb0d73fe 100644
--- a/src/main/kotlin/com/r3corda/demos/TraderDemo.kt
+++ b/src/main/kotlin/com/r3corda/demos/TraderDemo.kt
@@ -201,7 +201,8 @@ fun runBuyer(node: Node, amount: Amount<Issued<Currency>>) {
     }
 
     val future = if (node.isPreviousCheckpointsPresent) {
-        node.smm.findStateMachines(TraderDemoProtocolBuyer::class.java).single().second
+        val (@Suppress("UNUSED_VARIABLE") buyer, future) = node.smm.findStateMachines(TraderDemoProtocolBuyer::class.java).single()
+        future
     } else {
         // We use a simple scenario-specific wrapper protocol to make things happen.
         val buyer = TraderDemoProtocolBuyer(attachmentsPath, node.info.identity, amount)