diff --git a/nicrealtek.c b/nicrealtek.c
index 6825c0c..c2abcfb 100644
--- a/nicrealtek.c
+++ b/nicrealtek.c
@@ -29,12 +29,12 @@
 #define BIOS_ROM_ADDR		0xD4
 #define BIOS_ROM_DATA		0xD7
 
-struct pcidev_status nics_realtek[] = {
+const struct pcidev_status nics_realtek[] = {
 	{0x10ec, 0x8139, OK, "Realtek", "RTL8139/8139C/8139C+"},
 	{},
 };
 
-struct pcidev_status nics_realteksmc1211[] = {
+const struct pcidev_status nics_realteksmc1211[] = {
 	{0x1113, 0x1211, OK, "SMC2", "1211TX"}, /* RTL8139 clone */
 	{},
 };