diff --git a/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala b/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala
index 87d0507c9b3b..5bb605c05e83 100644
--- a/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala
+++ b/compiler/src/dotty/tools/dotc/transform/patmat/Space.scala
@@ -542,7 +542,7 @@ object SpaceEngine {
 
     debug.println(s"signature of ${unappSym.showFullName} ----> ${sig.map(_.show).mkString(", ")}")
 
-    sig.map(_.annotatedToRepeated)
+    sig
   }
 
   /** Whether the extractor covers the given type */