diff --git a/node/src/main/kotlin/com/r3corda/node/internal/testing/Simulation.kt b/node/src/main/kotlin/com/r3corda/node/internal/testing/Simulation.kt
index a91a1e159e..9168d1728d 100644
--- a/node/src/main/kotlin/com/r3corda/node/internal/testing/Simulation.kt
+++ b/node/src/main/kotlin/com/r3corda/node/internal/testing/Simulation.kt
@@ -214,8 +214,8 @@ abstract class Simulation(val runAsync: Boolean,
         }
     }
 
-    val networkInitialisationFinished: ListenableFuture<Unit> =
-            Futures.transform(Futures.allAsList(network.nodes.map { it.networkMapRegistrationFuture }), Function { })
+    val networkInitialisationFinished: ListenableFuture<*> =
+            Futures.allAsList(network.nodes.map { it.networkMapRegistrationFuture })
 
     fun start(): ListenableFuture<Unit> {
         network.startNodes()
@@ -250,4 +250,4 @@ abstract class Simulation(val runAsync: Boolean,
         }
         next(0, 1)
     }
-}
\ No newline at end of file
+}