diff --git a/lib/dns/rdata/rdatastructpre.h b/lib/dns/rdata/rdatastructpre.h
index 85302f0d82..52df9cfe14 100644
--- a/lib/dns/rdata/rdatastructpre.h
+++ b/lib/dns/rdata/rdatastructpre.h
@@ -31,9 +31,9 @@ typedef struct dns_rdatacommon {
 	ISC_LINK(struct dns_rdatacommon)	link;
 } dns_rdatacommon_t;
 
-#define DNS_RDATACOMMON_INIT(DATA, RDTYPE, RDCLASS) \
+#define DNS_RDATACOMMON_INIT(data, rdtype, rdclass) \
 	do { \
-		(DATA)->common.rdtype = (RDTYPE); \
-		(DATA)->common.rdclass = (RDCLASS); \
-		ISC_LINK_INIT(&(DATA)->common, link); \
+		(data)->common.rdtype = (rdtype); \
+		(data)->common.rdclass = (rdclass); \
+		ISC_LINK_INIT(&(data)->common, link); \
 	} while (0)