diff --git a/guides/source/layouts_and_rendering.md b/guides/source/layouts_and_rendering.md
index 1ab841b137..f6cac997ff 100644
--- a/guides/source/layouts_and_rendering.md
+++ b/guides/source/layouts_and_rendering.md
@@ -629,7 +629,7 @@ def show
   @book = Book.find_by_id(params[:id])
   if @book.nil?
     @books = Book.all
-    flash[:alert] = "Your book was not found"
+    flash.now[:alert] = "Your book was not found"
     render "index"
   end
 end