2 files changed, 3 insertions, 6 deletions
diff --git a/src/dotty/tools/dotc/core/tasty/TreePickler.scala b/src/dotty/tools/dotc/core/tasty/TreePickler.scala
index b6f52c0ec..8889e8a5c 100644
--- a/src/dotty/tools/dotc/core/tasty/TreePickler.scala
+++ b/src/dotty/tools/dotc/core/tasty/TreePickler.scala
@@ -251,7 +251,7 @@ class TreePickler(pickler: TastyPickler) {
     case tpe: ExprType =>
       writeByte(BYNAMEtype)
       pickleType(tpe.underlying)
-    case tpe: TypeLambda =>
+    case tpe: PolyType =>
       writeByte(LAMBDAtype)
       val paramNames = tpe.typeParams.map(tparam =>
         varianceToPrefix(tparam.paramVariance) +: tparam.paramName)
@@ -259,9 +259,6 @@ class TreePickler(pickler: TastyPickler) {
     case tpe: MethodType if richTypes =>
       writeByte(METHODtype)
       pickleMethodic(tpe.resultType, tpe.paramNames, tpe.paramTypes)
-    case tpe: PolyType if richTypes =>
-      writeByte(POLYtype)
-      pickleMethodic(tpe.resultType, tpe.paramNames, tpe.paramBounds)
     case tpe: PolyParam =>
       if (!pickleParamType(tpe))
       // TODO figure out why this case arises in e.g. pickling AbstractFileReader.
diff --git a/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala b/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
index 09f2c0d1f..f67159808 100644
--- a/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
+++ b/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
@@ -270,7 +270,7 @@ class TreeUnpickler(reader: TastyReader, tastyName: TastyName.Table, posUnpickle
               val (rawNames, paramReader) = readNamesSkipParams
               val (variances, paramNames) = rawNames
                 .map(name => (prefixToVariance(name.head), name.tail.toTypeName)).unzip
-              val result = TypeLambda(paramNames, variances)(
+              val result = PolyType(paramNames, variances)(
                 pt => registeringType(pt, paramReader.readParamTypes[TypeBounds](end)),
                 pt => readType())
               goto(end)
@@ -290,7 +290,7 @@ class TreeUnpickler(reader: TastyReader, tastyName: TastyName.Table, posUnpickle
               result
             case PARAMtype =>
               readTypeRef() match {
-                case binder: GenericType => PolyParam(binder, readNat())
+                case binder: PolyType => PolyParam(binder, readNat())
                 case binder: MethodType => MethodParam(binder, readNat())
               }
             case CLASSconst =>