diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index 4e99981..cac9fdd 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -852,7 +852,7 @@
 	return 0;
 }
 
-int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
+static int bus_speed[8] = {33, 133, 133, 200, 266, 133, 200, 266};
 /**
  * s2io_print_pci_mode -
  */