diff --git a/core/src/main/scala-2.13+/cats/data/ZipLazyList.scala b/core/src/main/scala-2.13+/cats/data/ZipLazyList.scala
index 20c4832560f..191bd93564c 100644
--- a/core/src/main/scala-2.13+/cats/data/ZipLazyList.scala
+++ b/core/src/main/scala-2.13+/cats/data/ZipLazyList.scala
@@ -24,6 +24,12 @@ object ZipLazyList {
 
       def combineK[A](x: ZipLazyList[A], y: ZipLazyList[A]): ZipLazyList[A] =
         ZipLazyList(cats.instances.lazyList.catsStdInstancesForLazyList.combineK(x.value, y.value))
+
+      override def prependK[A](a: A, fa: ZipLazyList[A]): ZipLazyList[A] =
+        ZipLazyList(cats.instances.lazyList.catsStdInstancesForLazyList.prependK(a, fa.value))
+
+      override def appendK[A](fa: ZipLazyList[A], a: A): ZipLazyList[A] =
+        ZipLazyList(cats.instances.lazyList.catsStdInstancesForLazyList.appendK(fa.value, a))
     }
 
   implicit def catsDataEqForZipLazyList[A: Eq]: Eq[ZipLazyList[A]] =
diff --git a/core/src/main/scala-2.13+/cats/data/ZipStream.scala b/core/src/main/scala-2.13+/cats/data/ZipStream.scala
index fbb375eca85..3ecdd11bbdc 100644
--- a/core/src/main/scala-2.13+/cats/data/ZipStream.scala
+++ b/core/src/main/scala-2.13+/cats/data/ZipStream.scala
@@ -26,6 +26,12 @@ object ZipStream {
 
       def combineK[A](x: ZipStream[A], y: ZipStream[A]): ZipStream[A] =
         ZipStream(cats.instances.stream.catsStdInstancesForStream.combineK(x.value, y.value))
+
+      override def prependK[A](a: A, fa: ZipStream[A]): ZipStream[A] =
+        ZipStream(cats.instances.stream.catsStdInstancesForStream.prependK(a, fa.value))
+
+      override def appendK[A](fa: ZipStream[A], a: A): ZipStream[A] =
+        ZipStream(cats.instances.stream.catsStdInstancesForStream.appendK(fa.value, a))
     }
 
   implicit def catsDataEqForZipStream[A: Eq]: Eq[ZipStream[A]] =