diff --git a/drivers/net/s2io.h b/drivers/net/s2io.h
index 7142cf8..3afd912 100644
--- a/drivers/net/s2io.h
+++ b/drivers/net/s2io.h
@@ -999,7 +999,7 @@
 s2io_msix_fifo_handle(int irq, void *dev_id, struct pt_regs *regs);
 static irqreturn_t s2io_isr(int irq, void *dev_id, struct pt_regs *regs);
 static int verify_xena_quiescence(nic_t *sp, u64 val64, int flag);
-static struct ethtool_ops netdev_ethtool_ops;
+static const struct ethtool_ops netdev_ethtool_ops;
 static void s2io_set_link(unsigned long data);
 static int s2io_set_swapper(nic_t * sp);
 static void s2io_card_down(nic_t *nic);