diff --git a/clang/include/clang/Basic/AttrDocs.td b/clang/include/clang/Basic/AttrDocs.td
index 5222c92c42a0e..8a5b9b8402f47 100644
--- a/clang/include/clang/Basic/AttrDocs.td
+++ b/clang/include/clang/Basic/AttrDocs.td
@@ -4359,7 +4359,7 @@ with this attribute. This is because previously constructed subobjects need to
 be destroyed if an exception gets thrown before the initialization of the
 complete object is complete. For instance:
 
-.. code-block::c++
+.. code-block:: c++
 
   void f() {
     try {