diff --git a/Documentation/conf.py b/Documentation/conf.py
index 3a1a804c3a13d..a3d1fe9dfcf92 100644
--- a/Documentation/conf.py
+++ b/Documentation/conf.py
@@ -106,6 +106,7 @@ def have_command(cmd):
             "__weak",
             "noinline",
             "__fix_address",
+            "__counted_by",
 
             # include/linux/memblock.h:
             "__init_memblock",