diff --git a/sys/dev/ixgbe/ixgbe_osdep.h b/sys/dev/ixgbe/ixgbe_osdep.h
index b7eaa788c99..5e211e6283e 100644
--- a/sys/dev/ixgbe/ixgbe_osdep.h
+++ b/sys/dev/ixgbe/ixgbe_osdep.h
@@ -161,18 +161,6 @@ typedef boolean_t	bool;
 
 #define le16_to_cpu
 
-#if __FreeBSD_version < 800000
-#if defined(__i386__) || defined(__amd64__)
-#define mb()	__asm volatile("mfence" ::: "memory")
-#define wmb()	__asm volatile("sfence" ::: "memory")
-#define rmb()	__asm volatile("lfence" ::: "memory")
-#else
-#define mb()
-#define rmb()
-#define wmb()
-#endif
-#endif
-
 #if defined(__i386__) || defined(__amd64__)
 static __inline
 void prefetch(void *x)