diff --git a/lib/dns/include/dns/rdataslab.h b/lib/dns/include/dns/rdataslab.h
index 45bff01d1a..a292b4acd3 100644
--- a/lib/dns/include/dns/rdataslab.h
+++ b/lib/dns/include/dns/rdataslab.h
@@ -143,6 +143,12 @@ struct dns_slabheader {
 	 * rendering that character upper case.
 	 */
 	unsigned char upper[32];
+
+	/*%
+	 * Flexible member indicates the address of the raw data
+	 * following this header.
+	 */
+	unsigned char raw[];
 };
 
 enum {
@@ -278,12 +284,6 @@ dns_rdataslab_equalx(dns_slabheader_t *header1, dns_slabheader_t *header2,
  *\li	true if the slabs are equal, #false otherwise.
  */
 
-void *
-dns_slabheader_raw(dns_slabheader_t *header);
-/*%
- * Returns the address of the raw memory following a dns_slabheader.
- */
-
 void
 dns_slabheader_setownercase(dns_slabheader_t *header, const dns_name_t *name);
 /*%<
diff --git a/lib/dns/qpcache.c b/lib/dns/qpcache.c
index 7613105123..db285441c4 100644
--- a/lib/dns/qpcache.c
+++ b/lib/dns/qpcache.c
@@ -1072,7 +1072,7 @@ bindrdataset(qpcache_t *qpdb, qpcnode_t *node, dns_slabheader_t *header,
 
 	rdataset->slab.db = (dns_db_t *)qpdb;
 	rdataset->slab.node = (dns_dbnode_t *)node;
-	rdataset->slab.raw = dns_slabheader_raw(header);
+	rdataset->slab.raw = header->raw;
 	rdataset->slab.iter_pos = NULL;
 	rdataset->slab.iter_count = 0;
 
@@ -2913,8 +2913,8 @@ addnoqname(isc_mem_t *mctx, dns_slabheader_t *newheader, uint32_t maxrrperset,
 
 	noqname = isc_mem_get(mctx, sizeof(*noqname));
 	*noqname = (dns_slabheader_proof_t){
-		.neg = dns_slabheader_raw((dns_slabheader_t *)r1.base),
-		.negsig = dns_slabheader_raw((dns_slabheader_t *)r2.base),
+		.neg = ((dns_slabheader_t *)r1.base)->raw,
+		.negsig = ((dns_slabheader_t *)r2.base)->raw,
 		.type = neg.type,
 		.name = DNS_NAME_INITEMPTY,
 	};
@@ -2952,8 +2952,8 @@ addclosest(isc_mem_t *mctx, dns_slabheader_t *newheader, uint32_t maxrrperset,
 
 	closest = isc_mem_get(mctx, sizeof(*closest));
 	*closest = (dns_slabheader_proof_t){
-		.neg = dns_slabheader_raw((dns_slabheader_t *)r1.base),
-		.negsig = dns_slabheader_raw((dns_slabheader_t *)r2.base),
+		.neg = ((dns_slabheader_t *)r1.base)->raw,
+		.negsig = ((dns_slabheader_t *)r2.base)->raw,
 		.name = DNS_NAME_INITEMPTY,
 		.type = neg.type,
 	};
diff --git a/lib/dns/qpzone.c b/lib/dns/qpzone.c
index 3f2124546b..16f67d3ded 100644
--- a/lib/dns/qpzone.c
+++ b/lib/dns/qpzone.c
@@ -1042,7 +1042,7 @@ bindrdataset(qpzonedb_t *qpdb, qpznode_t *node, dns_slabheader_t *header,
 
 	rdataset->slab.db = (dns_db_t *)qpdb;
 	rdataset->slab.node = (dns_dbnode_t *)node;
-	rdataset->slab.raw = dns_slabheader_raw(header);
+	rdataset->slab.raw = header->raw;
 	rdataset->slab.iter_pos = NULL;
 	rdataset->slab.iter_count = 0;
 
@@ -1110,7 +1110,7 @@ setnsec3parameters(dns_db_t *db, qpz_version_t *version) {
 		/*
 		 * Find an NSEC3PARAM with a supported algorithm.
 		 */
-		raw = dns_slabheader_raw(found);
+		raw = found->raw;
 		count = get_uint16(raw);
 		while (count-- > 0U) {
 			dns_rdata_t rdata = DNS_RDATA_INIT;
diff --git a/lib/dns/rdataslab.c b/lib/dns/rdataslab.c
index 48fd9962d1..2297418665 100644
--- a/lib/dns/rdataslab.c
+++ b/lib/dns/rdataslab.c
@@ -800,11 +800,6 @@ dns_rdataslab_equalx(dns_slabheader_t *slab1, dns_slabheader_t *slab2,
 	return true;
 }
 
-void *
-dns_slabheader_raw(dns_slabheader_t *header) {
-	return header + 1;
-}
-
 void
 dns_slabheader_setownercase(dns_slabheader_t *header, const dns_name_t *name) {
 	REQUIRE(!CASESET(header));