diff --git a/lib/elixir/lib/string.ex b/lib/elixir/lib/string.ex
index 4b42cce9aa..6b7795a173 100644
--- a/lib/elixir/lib/string.ex
+++ b/lib/elixir/lib/string.ex
@@ -1327,7 +1327,7 @@ defmodule String do
 
   @doc ~S"""
   Returns a string where all trailing Unicode whitespaces
-  has been removed.
+  have been removed.
 
   ## Examples