diff --git a/node/src/main/kotlin/net/corda/node/services/statemachine/FlowStateMachineImpl.kt b/node/src/main/kotlin/net/corda/node/services/statemachine/FlowStateMachineImpl.kt
index ebe89b5d4c..db697148cd 100644
--- a/node/src/main/kotlin/net/corda/node/services/statemachine/FlowStateMachineImpl.kt
+++ b/node/src/main/kotlin/net/corda/node/services/statemachine/FlowStateMachineImpl.kt
@@ -62,7 +62,6 @@ import org.apache.activemq.artemis.utils.ReusableLatch
 import org.slf4j.Logger
 import org.slf4j.LoggerFactory
 import org.slf4j.MDC
-import java.time.Duration
 import java.util.concurrent.TimeUnit
 
 class FlowPermissionException(message: String) : FlowException(message)
@@ -336,7 +335,7 @@ class FlowStateMachineImpl<R>(override val id: StateMachineRunId,
         val startTime = System.nanoTime()
         serviceHub.monitoringService.metrics
                 .timer("Flows.StartupQueueTime")
-                .update(Duration.ofNanos(startTime).toMillis() - creationTime, TimeUnit.MILLISECONDS)
+                .update(System.currentTimeMillis() - creationTime, TimeUnit.MILLISECONDS)
         var initialised = false
         val resultOrError = try {