diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 4ebc5378d3f7..cf7cfa45c7d2 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -152,7 +152,7 @@ static int ipv4_ping_group_range(struct ctl_table *table, int write,
 }
 
 /* Validate changes from /proc interface. */
-static int proc_tcp_default_init_rwnd(ctl_table *ctl, int write,
+static int proc_tcp_default_init_rwnd(struct ctl_table *ctl, int write,
 				      void __user *buffer,
 				      size_t *lenp, loff_t *ppos)
 {