diff --git a/include/linux/if_bonding.h b/include/linux/if_bonding.h
index 84598fa..65c2d24 100644
--- a/include/linux/if_bonding.h
+++ b/include/linux/if_bonding.h
@@ -85,7 +85,8 @@
 
 /* hashing types */
 #define BOND_XMIT_POLICY_LAYER2		0 /* layer 2 (MAC only), default */
-#define BOND_XMIT_POLICY_LAYER34	1 /* layer 3+4 (IP ^ MAC) */
+#define BOND_XMIT_POLICY_LAYER34	1 /* layer 3+4 (IP ^ (TCP || UDP)) */
+#define BOND_XMIT_POLICY_LAYER23	2 /* layer 2+3 (IP ^ MAC) */
 
 typedef struct ifbond {
 	__s32 bond_mode;