diff --git a/client/src/main/kotlin/com/r3corda/client/mock/EventGenerator.kt b/client/src/main/kotlin/com/r3corda/client/mock/EventGenerator.kt
index c96979e4b2..9692ef04f6 100644
--- a/client/src/main/kotlin/com/r3corda/client/mock/EventGenerator.kt
+++ b/client/src/main/kotlin/com/r3corda/client/mock/EventGenerator.kt
@@ -4,6 +4,7 @@ import com.r3corda.contracts.asset.Cash
 import com.r3corda.core.contracts.*
 import com.r3corda.core.crypto.Party
 import com.r3corda.core.serialization.OpaqueBytes
+import com.r3corda.core.transactions.TransactionBuilder
 import com.r3corda.node.services.monitor.ServiceToClientEvent
 import java.time.Instant