diff --git a/free-programming-books-ru.md b/free-programming-books-ru.md
index 6e625e2f7..56a6c5d12 100644
--- a/free-programming-books-ru.md
+++ b/free-programming-books-ru.md
@@ -135,7 +135,7 @@
 
 ### Lisp
 * [Lisp In Small Pieces (translation)](https://github.com/ilammy/lisp)
-* [Practical Common Lisp(translation)](http://lisper.ru/pcl)
+* [Practical Common Lisp(translation)](http://lisper.ru/pcl/)
 
 
 ### MetaPost