diff --git a/nic3com.c b/nic3com.c
index 94f4776..f8e5bd8 100644
--- a/nic3com.c
+++ b/nic3com.c
@@ -31,10 +31,10 @@
 
 #define PCI_VENDOR_ID_3COM	0x10b7
 
-uint32_t internal_conf;
-uint16_t id;
+static uint32_t internal_conf;
+static uint16_t id;
 
-struct pcidev_status nics_3com[] = {
+const struct pcidev_status nics_3com[] = {
 	/* 3C90xB */
 	{0x10b7, 0x9055, OK, "3COM", "3C90xB: PCI 10/100 Mbps; shared 10BASE-T/100BASE-TX"},
 	{0x10b7, 0x9001, NT, "3COM", "3C90xB: PCI 10/100 Mbps; shared 10BASE-T/100BASE-T4" },