diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 78a20cec2a0a..219f53c30cb3 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -3744,7 +3744,7 @@ void netdev_lower_state_changed(struct net_device *lower_dev,
 
 /* RSS keys are 40 or 52 bytes long */
 #define NETDEV_RSS_KEY_LEN 52
-extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
+extern u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 void netdev_rss_key_fill(void *buffer, size_t len);
 
 int dev_get_nest_level(struct net_device *dev,
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index daf04709dd3c..453c803f1c87 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -632,7 +632,7 @@ static int ethtool_copy_validate_indir(u32 *indir, void __user *useraddr,
 	return 0;
 }
 
-u8 netdev_rss_key[NETDEV_RSS_KEY_LEN];
+u8 netdev_rss_key[NETDEV_RSS_KEY_LEN] __read_mostly;
 
 void netdev_rss_key_fill(void *buffer, size_t len)
 {