diff --git a/include/linux/brcmphy.h b/include/linux/brcmphy.h
index b840a49..677b4f0 100644
--- a/include/linux/brcmphy.h
+++ b/include/linux/brcmphy.h
@@ -1,3 +1,6 @@
+#ifndef _LINUX_BRCMPHY_H
+#define _LINUX_BRCMPHY_H
+
 #define PHY_ID_BCM50610			0x0143bd60
 #define PHY_ID_BCM50610M		0x0143bd70
 #define PHY_ID_BCM5241			0x0143bc30
@@ -29,3 +32,5 @@
 #define PHY_BRCM_CLEAR_RGMII_MODE	0x00004000
 #define PHY_BRCM_DIS_TXCRXC_NOENRGY	0x00008000
 #define PHY_BCM_FLAGS_VALID		0x80000000
+
+#endif /* _LINUX_BRCMPHY_H */