diff --git a/stream/src/main/scala-2.12/org/apache/pekko/stream/javadsl/CollectionUtil.scala b/stream/src/main/scala-2.12/org/apache/pekko/stream/javadsl/CollectionUtil.scala
index fd4eb90c7d..d0c1f24507 100644
--- a/stream/src/main/scala-2.12/org/apache/pekko/stream/javadsl/CollectionUtil.scala
+++ b/stream/src/main/scala-2.12/org/apache/pekko/stream/javadsl/CollectionUtil.scala
@@ -26,7 +26,7 @@ import pekko.util.ccompat.JavaConverters._
 /**
  * INTERNAL API
  */
-private[javadsl] final object CollectionUtil {
+private[javadsl] object CollectionUtil {
   @inline def toSeq[T](jlist: java.util.List[T]): immutable.Seq[T] =
     jlist.asScala.toList
 
diff --git a/stream/src/main/scala-2.13+/org/apache/pekko/stream/javadsl/CollectionUtil.scala b/stream/src/main/scala-2.13+/org/apache/pekko/stream/javadsl/CollectionUtil.scala
index 51c9c86f61..d9bbde82c8 100644
--- a/stream/src/main/scala-2.13+/org/apache/pekko/stream/javadsl/CollectionUtil.scala
+++ b/stream/src/main/scala-2.13+/org/apache/pekko/stream/javadsl/CollectionUtil.scala
@@ -26,7 +26,7 @@ import pekko.util.ccompat.JavaConverters._
 /**
  * INTERNAL API
  */
-private[javadsl] final object CollectionUtil {
+private[javadsl] object CollectionUtil {
   @inline def toSeq[T](jlist: java.util.List[T]): immutable.Seq[T] =
     jlist.asScala.toSeq