diff --git a/compile/interface/src/main/scala/xsbt/Compat.scala b/compile/interface/src/main/scala/xsbt/Compat.scala
index 5b8c3983b..9f9fb247c 100644
--- a/compile/interface/src/main/scala/xsbt/Compat.scala
+++ b/compile/interface/src/main/scala/xsbt/Compat.scala
@@ -45,15 +45,10 @@ abstract class Compat {
   val Nullary = global.NullaryMethodType
   val ScalaObjectClass = definitions.ScalaObjectClass
 
-  // `afterPostErasure` doesn't exist in Scala < 2.10
-  implicit def withAfterPostErasure(global: Global): WithAfterPostErasure = new WithAfterPostErasure(global)
-  class WithAfterPostErasure(global: Global) {
-    def afterPostErasure[T](op: => T): T = op
-  }
-  // `exitingPostErasure` was called `afterPostErasure` in 2.10
-  implicit def withExitingPostErasure(global: Global): WithExitingPostErasure = new WithExitingPostErasure(global)
-  class WithExitingPostErasure(global: Global) {
-    def exitingPostErasure[T](op: => T): T = global afterPostErasure op
+  // `transformedType` doesn't exist in Scala < 2.10
+  implicit def withTransformedType(global: Global): WithTransformedType = new WithTransformedType(global)
+  class WithTransformedType(global: Global) {
+    def transformedType(tpe: Type): Type = tpe
   }
 
   private[this] final class MiscCompat {
diff --git a/compile/interface/src/main/scala/xsbt/ExtractAPI.scala b/compile/interface/src/main/scala/xsbt/ExtractAPI.scala
index 3810a23bd..31389218b 100644
--- a/compile/interface/src/main/scala/xsbt/ExtractAPI.scala
+++ b/compile/interface/src/main/scala/xsbt/ExtractAPI.scala
@@ -277,7 +277,7 @@ class ExtractAPI[GlobalType <: CallbackGlobal](val global: GlobalType,
               val beforeErasure = makeDef(processType(in, dropConst(returnType)))
               val afterErasure =
                 if (inspectPostErasure) {
-                  val erasedReturn = dropConst(transformedType(viewer(in).memberInfo(s))) map {
+                  val erasedReturn = dropConst(global.transformedType(viewer(in).memberInfo(s))) map {
                     case MethodType(_, r) => r
                     case other            => other
                   }
@@ -288,7 +288,7 @@ class ExtractAPI[GlobalType <: CallbackGlobal](val global: GlobalType,
           }
         }
       def parameterS(erase: Boolean)(s: Symbol): xsbti.api.MethodParameter = {
-        val tp = if (erase) transformedType(s.info) else s.info
+        val tp = if (erase) global.transformedType(s.info) else s.info
         makeParameter(simpleName(s), tp, tp.typeSymbol, s)
       }