diff --git a/core/shared/src/main/scala-3/cats/effect/cps.scala b/core/shared/src/main/scala-3/cats/effect/cps.scala
index 5b6667b..a4c77a3 100644
--- a/core/shared/src/main/scala-3/cats/effect/cps.scala
+++ b/core/shared/src/main/scala-3/cats/effect/cps.scala
@@ -21,6 +21,7 @@ import _root_.cps.{async, await, CpsAsyncMonad, CpsAwaitable, CpsConcurrentEffec
 import cats.effect.kernel.{Async, Concurrent, Fiber, Sync}
 import cats.effect.kernel.syntax.all._
 
+import scala.annotation.implicitNotFound
 import scala.util.Try
 
 object cps {
@@ -31,11 +32,18 @@ object cps {
     transparent inline def await: A = _root_.cps.await[F, A, F](self)
   }
 
+  @implicitNotFound("automatic coloring is disabled")
+  implicit def automaticColoringTag1[F[_]:Concurrent]: _root_.cps.automaticColoring.AutomaticColoringTag[F] = ???
+  implicit def automaticColoringTag2[F[_]:Concurrent]: _root_.cps.automaticColoring.AutomaticColoringTag[F] = ???
+
+  // actually not used by dotty-cps-async but need for binary compability with cats-effect-cps 0.4.x.
+  // TODO: remove in 0.5.0
   implicit def catsEffectCpsMonadPureMemoization[F[_]](implicit F: Concurrent[F]): CpsMonadMemoization.Pure[F] =
     new CpsMonadMemoization.Pure[F] {
       def apply[A](fa: F[A]): F[F[A]] = F.memoize(fa)
     }
 
+
   // TODO we can actually provide some more gradient instances here
   implicit def catsEffectCpsConcurrentMonad[F[_]](implicit F: Async[F]): CpsConcurrentEffectMonad[F] with CpsMonadInstanceContext[F] =
     new CpsConcurrentEffectMonad[F] with CpsMonadInstanceContext[F] {