diff --git a/libc/kernel/uapi/linux/genetlink.h b/libc/kernel/uapi/linux/genetlink.h
index 2e2137d..0f86331 100644
--- a/libc/kernel/uapi/linux/genetlink.h
+++ b/libc/kernel/uapi/linux/genetlink.h
@@ -81,6 +81,7 @@
   CTRL_ATTR_MCAST_GRP_ID,
   __CTRL_ATTR_MCAST_GRP_MAX,
 };
+#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
 enum {
   CTRL_ATTR_POLICY_UNSPEC,
   CTRL_ATTR_POLICY_DO,
@@ -88,5 +89,5 @@
   __CTRL_ATTR_POLICY_DUMP_MAX,
   CTRL_ATTR_POLICY_DUMP_MAX = __CTRL_ATTR_POLICY_DUMP_MAX - 1
 };
-#define CTRL_ATTR_MCAST_GRP_MAX (__CTRL_ATTR_MCAST_GRP_MAX - 1)
+#define CTRL_ATTR_POLICY_MAX (__CTRL_ATTR_POLICY_DUMP_MAX - 1)
 #endif