diff --git a/drivers/net/efi-snp.c b/drivers/net/efi-snp.c
index 5b96fbf..963d539 100644
--- a/drivers/net/efi-snp.c
+++ b/drivers/net/efi-snp.c
@@ -238,7 +238,7 @@
 	return 0;
 }
 
-static int efi_snp_set_ethaddr(struct eth_device *edev, unsigned char *adr)
+static int efi_snp_set_ethaddr(struct eth_device *edev, const unsigned char *adr)
 {
 	return 0;
 }