diff --git a/slick-additions-entity/src/main/scala/slick/additions/entity/Entity.scala b/slick-additions-entity/src/main/scala/slick/additions/entity/Entity.scala
index 7fc8435..646df90 100644
--- a/slick-additions-entity/src/main/scala/slick/additions/entity/Entity.scala
+++ b/slick-additions-entity/src/main/scala/slick/additions/entity/Entity.scala
@@ -33,6 +33,7 @@ case class EntityKey[K, +A](override val key: K) extends Lookup[K, A] {
   override def updated[B](value: B)                     = ModifiedEntity(key, value)
   override def widen[B >: A]: EntityKey[K, B]           = transform(identity)
   override def toEntityKey                              = this
+  def asKeyOf[B]                                        = copy[K, B]()
 }
 
 sealed trait Entity[K, +A]                             extends EntityRef[K, A] {