diff --git a/core/src/main/scala/cats/data/NonEmptyList.scala b/core/src/main/scala/cats/data/NonEmptyList.scala
index 875609c2368..c28fa9b8395 100644
--- a/core/src/main/scala/cats/data/NonEmptyList.scala
+++ b/core/src/main/scala/cats/data/NonEmptyList.scala
@@ -82,6 +82,9 @@ final case class NonEmptyList[+A](head: A, tail: List[A]) {
   def ::[AA >: A](a: AA): NonEmptyList[AA] =
     NonEmptyList(a, head :: tail)
 
+  def :::[AA >: A](other: NonEmptyList[AA]): NonEmptyList[AA] =
+    other.concat(this)
+
   /**
    * Remove elements not matching the predicate
    *