diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 3887fe6..ba443f6 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -575,8 +575,7 @@
 #define SIZE_OF_BLOCK	4096
 
 #define RXD_MODE_1	0 /* One Buffer mode */
-#define RXD_MODE_3A	1 /* Three Buffer mode */
-#define RXD_MODE_3B	2 /* Two Buffer mode */
+#define RXD_MODE_3B	1 /* Two Buffer mode */
 
 /* Structure to hold virtual addresses of Buf0 and Buf1 in
  * 2buf mode. */