diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 60fc931..45e4bef 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1131,7 +1131,8 @@
 		.data		= &sysctl_max_map_count,
 		.maxlen		= sizeof(sysctl_max_map_count),
 		.mode		= 0644,
-		.proc_handler	= proc_dointvec
+		.proc_handler	= proc_dointvec,
+		.extra1		= &zero,
 	},
 #else
 	{