diff --git a/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala b/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
index bf5370e5ba54..c062e3fbae8e 100644
--- a/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
+++ b/compiler/src/dotty/tools/dotc/core/tasty/TastyUnpickler.scala
@@ -64,7 +64,6 @@ class TastyUnpickler(reader: TastyReader) {
         val result = readName().toTypeName
         val params = until(end)(readName().toTypeName)
         var sig = Signature(params, result)
-        if (sig == Signature.NotAMethod) sig = Signature.NotAMethod // needed temporarily, as long as we read old tasty
         original.withSig(sig).asInstanceOf[TermName]
       case _ =>
         simpleNameKindOfTag(tag)(readName())