1 files changed, 7 insertions, 3 deletions
diff --git a/src/main/scala/firrtl/transforms/RenameModules.scala b/src/main/scala/firrtl/transforms/RenameModules.scala
index af17dda9..c8a757ba 100644
--- a/src/main/scala/firrtl/transforms/RenameModules.scala
+++ b/src/main/scala/firrtl/transforms/RenameModules.scala
@@ -5,6 +5,8 @@ package firrtl.transforms
 import firrtl.analyses.{InstanceGraph, ModuleNamespaceAnnotation}
 import firrtl.ir._
 import firrtl._
+import firrtl.options.PreservesAll
+import firrtl.stage.Forms
 
 import scala.collection.mutable
 
@@ -12,9 +14,11 @@ import scala.collection.mutable
   *
   * using namespace created by [[analyses.GetNamespace]], create unique names for modules
   */
-class RenameModules extends Transform {
-  def inputForm: LowForm.type = LowForm
-  def outputForm: LowForm.type = LowForm
+class RenameModules extends Transform with DependencyAPIMigration with PreservesAll[Transform] {
+
+  override def prerequisites = Forms.LowForm
+  override def optionalPrerequisites = Seq.empty
+  override def dependents = Forms.LowEmitters
 
   def collectNameMapping(namespace: Namespace, moduleNameMap: mutable.HashMap[String, String])(mod: DefModule): Unit = {
     val newName = namespace.newName(mod.name)