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-rw-r--r--src/main/scala/firrtl/transforms/PropagatePresetAnnotations.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/main/scala/firrtl/transforms/PropagatePresetAnnotations.scala b/src/main/scala/firrtl/transforms/PropagatePresetAnnotations.scala
index 00a3802b..da803837 100644
--- a/src/main/scala/firrtl/transforms/PropagatePresetAnnotations.scala
+++ b/src/main/scala/firrtl/transforms/PropagatePresetAnnotations.scala
@@ -262,7 +262,7 @@ class PropagatePresetAnnotations extends Transform with DependencyAPIMigration {
*/
/** Annotate a given target and all its children according to the asyncCoMap */
- def annotateCo(ta: ReferenceTarget){
+ def annotateCo(ta: ReferenceTarget): Unit = {
if (asyncCoMap.contains(ta)){
toCleanUp += ta
asyncCoMap(ta) foreach( (t: ReferenceTarget) => {