diff --git a/README.md b/README.md
index e3bb1076c..57433ebb1 100644
--- a/README.md
+++ b/README.md
@@ -515,8 +515,9 @@ Use array destructuring to swap values between two variables.
 Return `arr.slice(1)`.
 
 ```js
-const tail = arr => arr.slice(1);
+const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 // tail([1,2,3]) -> [2,3]
+// tail([1]) -> [1]
 ```
 
 ### Unique values of array
diff --git a/snippets/tail-of-list.md b/snippets/tail-of-list.md
index 9a9513262..cecca8e8e 100644
--- a/snippets/tail-of-list.md
+++ b/snippets/tail-of-list.md
@@ -3,6 +3,7 @@
 Return `arr.slice(1)`.
 
 ```js
-const tail = arr => arr.slice(1);
+const tail = arr => arr.length > 1 ? arr.slice(1) : arr;
 // tail([1,2,3]) -> [2,3]
+// tail([1]) -> [1]
 ```