diff --git a/content/toc.md b/content/toc.md
index b6a6137..5eedfa3 100644
--- a/content/toc.md
+++ b/content/toc.md
@@ -23,6 +23,6 @@
 * [Bitsets](/bitsets/)
 * [Varargs](/varargs/)
 * [OOP Macro](/oop_macro/)
-<!--* OpenGL
-  * [Triangle](/opengl/triangle/)-->
+
+<!-- * OpenGL  * [Triangle](/opengl/triangle/)-->
 {: #toc-list}