diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index a656d18..8d9cd60 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -308,6 +308,11 @@
 #define MAX_TX_FIFOS 8
 #define MAX_RX_RINGS 8
 
+#define MAX_RX_DESC_1  (MAX_RX_RINGS * MAX_RX_BLOCKS_PER_RING * 127 )
+#define MAX_RX_DESC_2  (MAX_RX_RINGS * MAX_RX_BLOCKS_PER_RING * 85 )
+#define MAX_RX_DESC_3  (MAX_RX_RINGS * MAX_RX_BLOCKS_PER_RING * 85 )
+#define MAX_TX_DESC    (MAX_AVAILABLE_TXDS)
+
 /* FIFO mappings for all possible number of fifos configured */
 static int fifo_map[][MAX_TX_FIFOS] = {
 	{0, 0, 0, 0, 0, 0, 0, 0},