diff --git a/books/free-programming-books-ta.md b/books/free-programming-books-ta.md
index 1fd986015..33ea43095 100644
--- a/books/free-programming-books-ta.md
+++ b/books/free-programming-books-ta.md
@@ -1,7 +1,7 @@
 ## Index
 
 * [AR/VR/MR](#ar-vr-mr)
-* [C++](#C++)
+* [C++](#c)
 * [Computer Vision](#computer-vision)
 * [DevOps](#devops)
 * [Ezhil](#ezhil)