diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index a6d3eaf..6a87b8c 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -91,11 +91,11 @@
 #define DRV_VERSION "2.0.26.27"
 
 /* S2io Driver name & version. */
-static char s2io_driver_name[] = "Neterion";
-static char s2io_driver_version[] = DRV_VERSION;
+static const char s2io_driver_name[] = "Neterion";
+static const char s2io_driver_version[] = DRV_VERSION;
 
-static int rxd_size[2] = {32, 48};
-static int rxd_count[2] = {127, 85};
+static const int rxd_size[2] = {32, 48};
+static const int rxd_count[2] = {127, 85};
 
 static inline int RXD_IS_UP2DT(struct RxD_t *rxdp)
 {
diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 1671443..7d16030 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -360,7 +360,7 @@
 #define MAX_TX_DESC    (MAX_AVAILABLE_TXDS)
 
 /* FIFO mappings for all possible number of fifos configured */
-static int fifo_map[][MAX_TX_FIFOS] = {
+static const int fifo_map[][MAX_TX_FIFOS] = {
 	{0, 0, 0, 0, 0, 0, 0, 0},
 	{0, 0, 0, 0, 1, 1, 1, 1},
 	{0, 0, 0, 1, 1, 1, 2, 2},
@@ -371,7 +371,7 @@
 	{0, 1, 2, 3, 4, 5, 6, 7},
 };
 
-static u16 fifo_selector[MAX_TX_FIFOS] = {0, 1, 3, 3, 7, 7, 7, 7};
+static const u16 fifo_selector[MAX_TX_FIFOS] = {0, 1, 3, 3, 7, 7, 7, 7};
 
 /* Maintains Per FIFO related information. */
 struct tx_fifo_config {