diff --git a/clang-tools-extra/clang-tidy/add_new_check.py b/clang-tools-extra/clang-tidy/add_new_check.py
--- a/clang-tools-extra/clang-tidy/add_new_check.py
+++ b/clang-tools-extra/clang-tidy/add_new_check.py
@@ -185,7 +185,7 @@
           check_added = True
           f.write(check_decl)
         else:
-          match = re.search('registerCheck<(.*)>', line)
+          match = re.search('registerCheck<((.*::).*)>', line)
           if match and match.group(1) > check_name_camel:
             check_added = True
             f.write(check_decl)