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-rw-r--r--core/src/main/scala/chisel3/Annotation.scala2
1 files changed, 1 insertions, 1 deletions
diff --git a/core/src/main/scala/chisel3/Annotation.scala b/core/src/main/scala/chisel3/Annotation.scala
index 0410e1df..f527182f 100644
--- a/core/src/main/scala/chisel3/Annotation.scala
+++ b/core/src/main/scala/chisel3/Annotation.scala
@@ -35,7 +35,7 @@ trait ChiselMultiAnnotation {
* FIRRTL.
*/
trait RunFirrtlTransform extends ChiselAnnotation {
- def transformClass: Class[_ <: Transform]
+ def transformClass: Class[? <: Transform]
}
object annotate {