diff --git a/kernel/wr-nic-core.c b/kernel/wr-nic-core.c
index bfc0e06dfd46ddeca1d5ce741846e4b54c83bb40..8a470102fabb1146c30a880a71c554c6fa88ef50 100644
--- a/kernel/wr-nic-core.c
+++ b/kernel/wr-nic-core.c
@@ -103,8 +103,8 @@ int wrn_fmc_probe(struct fmc_device *fmc)
 		return ret;
 	}
 
-	/* Verify that we have SDB at offset 0x63000 */
-	if (fmc_readl(fmc, 0x63000) != 0x5344422d) {
+	/* Verify that we have SDB at offset WRN_SDB_ADDR (0x63000) */
+	if (fmc_readl(fmc, WRN_SDB_ADDR) != 0x5344422d) {
 		dev_err(dev, "Can't find SDB magic\n");
 		ret = -ENODEV;
 		goto out;