diff --git a/libraries/stdlib/src/kotlin/JUtil.kt b/libraries/stdlib/src/kotlin/JUtil.kt
index 690aee1c07b..6052211b6c3 100644
--- a/libraries/stdlib/src/kotlin/JUtil.kt
+++ b/libraries/stdlib/src/kotlin/JUtil.kt
@@ -57,7 +57,7 @@ public inline fun <in T> List<T>.sort(transform: fun(T) : java.lang.Comparable<*
 */
 
 /**
- * Returns the first item in the list
+ * Returns the first item in the list or null if the list is empty
  *
  * @includeFunctionBody ../../test/ListTest.kt first
  */
@@ -66,7 +66,7 @@ val <T> List<T>.first : T?
 
 
 /**
- * Returns the last item in the list
+ * Returns the last item in the list or null if the list is empty
  *
  * @includeFunctionBody ../../test/ListTest.kt last
  */
@@ -85,7 +85,7 @@ val <T> List<T>.lastIndex : Int
     get() = this.size - 1
 
 /**
- * Returns the first item in the list
+ * Returns the first item in the list or null if the list is empty
  *
  * @includeFunctionBody ../../test/ListTest.kt head
  */