diff --git a/sys/dev/e1000/e1000_defines.h b/sys/dev/e1000/e1000_defines.h
index 5b77bd43af1a..e5435eb56dcd 100644
--- a/sys/dev/e1000/e1000_defines.h
+++ b/sys/dev/e1000/e1000_defines.h
@@ -1386,6 +1386,7 @@
 #define E1000_MDIC_ERROR	0x40000000
 #define E1000_MDIC_DEST		0x80000000
 
+#define E1000_VFTA_BLOCK_SIZE	8
 /* SerDes Control */
 #define E1000_GEN_CTL_READY		0x80000000
 #define E1000_GEN_CTL_ADDRESS_SHIFT	8