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-rw-r--r--src/main/scala/firrtl/transforms/Flatten.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/scala/firrtl/transforms/Flatten.scala b/src/main/scala/firrtl/transforms/Flatten.scala
index 6654667a..a94f5d5a 100644
--- a/src/main/scala/firrtl/transforms/Flatten.scala
+++ b/src/main/scala/firrtl/transforms/Flatten.scala
@@ -104,7 +104,7 @@ class Flatten extends Transform {
override def execute(state: CircuitState): CircuitState = {
val annos = state.annotations.collect { case a @ FlattenAnnotation(_) => a }
annos match {
- case Nil => CircuitState(state.circuit, state.form)
+ case Nil => state
case myAnnotations =>
val c = state.circuit
val (modNames, instNames) = collectAnns(state.circuit, myAnnotations)