diff --git a/generators/chipyard/src/main/scala/Clocks.scala b/generators/chipyard/src/main/scala/Clocks.scala
index 4219c914..bee73b69 100644
--- a/generators/chipyard/src/main/scala/Clocks.scala
+++ b/generators/chipyard/src/main/scala/Clocks.scala
@@ -111,7 +111,7 @@ object ClockingSchemeGenerators {
 
     val aggregator = LazyModule(new ClockGroupAggregator("allClocks")).node
     chiptop.implicitClockSinkNode := ClockGroup() := aggregator
-    systemAsyncClockGroup := ClockGroupNamePrefixer() := aggregator
+    systemAsyncClockGroup :*= ClockGroupNamePrefixer() :*= aggregator
 
     val referenceClockSource =  ClockSourceNode(Seq(ClockSourceParameters()))
     (aggregator