diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c
index 8d12888..147d783 100644
--- a/drivers/ide/pci/sl82c105.c
+++ b/drivers/ide/pci/sl82c105.c
@@ -387,7 +387,7 @@
 		hwif->serialized = hwif->mate->serialized = 1;
 }
 
-static struct ide_port_info sl82c105_chipset __devinitdata = {
+static const struct ide_port_info sl82c105_chipset __devinitdata = {
 	.name		= "W82C105",
 	.init_chipset	= init_chipset_sl82c105,
 	.init_hwif	= init_hwif_sl82c105,