diff --git a/include/linux/micrel_phy.h b/include/linux/micrel_phy.h
index 472fa4d..7361cd3 100644
--- a/include/linux/micrel_phy.h
+++ b/include/linux/micrel_phy.h
@@ -31,6 +31,7 @@
 #define PHY_ID_KSZ8081		0x00221560
 #define PHY_ID_KSZ8061		0x00221570
 #define PHY_ID_KSZ9031		0x00221620
+#define PHY_ID_KSZ9131		0x00221640
 
 #define PHY_ID_KSZ886X		0x00221430
 #define PHY_ID_KSZ8863		0x00221435