diff --git a/lib/dns/db_p.h b/lib/dns/db_p.h
index f12d9b4a33..fa6fa5485a 100644
--- a/lib/dns/db_p.h
+++ b/lib/dns/db_p.h
@@ -145,4 +145,46 @@ typedef struct {
 	bool exiting;
 } db_nodelock_t;
 
+static inline bool
+prio_type(dns_typepair_t type) {
+	switch (type) {
+	case dns_rdatatype_soa:
+	case DNS_SIGTYPE(dns_rdatatype_soa):
+	case dns_rdatatype_a:
+	case DNS_SIGTYPE(dns_rdatatype_a):
+	case dns_rdatatype_mx:
+	case DNS_SIGTYPE(dns_rdatatype_mx):
+	case dns_rdatatype_aaaa:
+	case DNS_SIGTYPE(dns_rdatatype_aaaa):
+	case dns_rdatatype_nsec:
+	case DNS_SIGTYPE(dns_rdatatype_nsec):
+	case dns_rdatatype_nsec3:
+	case DNS_SIGTYPE(dns_rdatatype_nsec3):
+	case dns_rdatatype_ns:
+	case DNS_SIGTYPE(dns_rdatatype_ns):
+	case dns_rdatatype_ds:
+	case DNS_SIGTYPE(dns_rdatatype_ds):
+	case dns_rdatatype_cname:
+	case DNS_SIGTYPE(dns_rdatatype_cname):
+	case dns_rdatatype_dname:
+	case DNS_SIGTYPE(dns_rdatatype_dname):
+	case dns_rdatatype_svcb:
+	case DNS_SIGTYPE(dns_rdatatype_svcb):
+	case dns_rdatatype_https:
+	case DNS_SIGTYPE(dns_rdatatype_https):
+	case dns_rdatatype_dnskey:
+	case DNS_SIGTYPE(dns_rdatatype_dnskey):
+	case dns_rdatatype_srv:
+	case DNS_SIGTYPE(dns_rdatatype_srv):
+	case dns_rdatatype_txt:
+	case DNS_SIGTYPE(dns_rdatatype_txt):
+	case dns_rdatatype_ptr:
+	case DNS_SIGTYPE(dns_rdatatype_ptr):
+	case dns_rdatatype_naptr:
+	case DNS_SIGTYPE(dns_rdatatype_naptr):
+		return (true);
+	}
+	return (false);
+}
+
 ISC_LANG_ENDDECLS
diff --git a/lib/dns/qpcache.c b/lib/dns/qpcache.c
index c56bc2abe7..2aa4b67aa3 100644
--- a/lib/dns/qpcache.c
+++ b/lib/dns/qpcache.c
@@ -2438,30 +2438,6 @@ again:
 	}
 }
 
-static bool
-prio_type(dns_typepair_t type) {
-	switch (type) {
-	case dns_rdatatype_soa:
-	case DNS_SIGTYPE(dns_rdatatype_soa):
-	case dns_rdatatype_a:
-	case DNS_SIGTYPE(dns_rdatatype_a):
-	case dns_rdatatype_aaaa:
-	case DNS_SIGTYPE(dns_rdatatype_aaaa):
-	case dns_rdatatype_nsec:
-	case DNS_SIGTYPE(dns_rdatatype_nsec):
-	case dns_rdatatype_nsec3:
-	case DNS_SIGTYPE(dns_rdatatype_nsec3):
-	case dns_rdatatype_ns:
-	case DNS_SIGTYPE(dns_rdatatype_ns):
-	case dns_rdatatype_ds:
-	case DNS_SIGTYPE(dns_rdatatype_ds):
-	case dns_rdatatype_cname:
-	case DNS_SIGTYPE(dns_rdatatype_cname):
-		return (true);
-	}
-	return (false);
-}
-
 /*%
  * These functions allow the heap code to rank the priority of each
  * element.  It returns true if v1 happens "sooner" than v2.
diff --git a/lib/dns/qpzone.c b/lib/dns/qpzone.c
index 4bcd5e2890..5a2b487ce1 100644
--- a/lib/dns/qpzone.c
+++ b/lib/dns/qpzone.c
@@ -330,31 +330,6 @@ typedef struct qpdb_dbiterator {
  */
 static atomic_uint_fast16_t init_count = 0;
 
-static bool
-prio_type(dns_typepair_t type) {
-	switch (type) {
-	case dns_rdatatype_soa:
-	case DNS_SIGTYPE(dns_rdatatype_soa):
-	case dns_rdatatype_a:
-	case DNS_SIGTYPE(dns_rdatatype_a):
-	case dns_rdatatype_aaaa:
-	case DNS_SIGTYPE(dns_rdatatype_aaaa):
-	case dns_rdatatype_nsec:
-	case DNS_SIGTYPE(dns_rdatatype_nsec):
-	case dns_rdatatype_ns:
-	case DNS_SIGTYPE(dns_rdatatype_ns):
-	case dns_rdatatype_ds:
-	case DNS_SIGTYPE(dns_rdatatype_ds):
-	case dns_rdatatype_nsec3:
-	case DNS_SIGTYPE(dns_rdatatype_nsec3):
-	case dns_rdatatype_cname:
-	case DNS_SIGTYPE(dns_rdatatype_cname):
-		return (true);
-	}
-
-	return (false);
-}
-
 /*
  * Locking
  *
diff --git a/lib/dns/rbtdb.c b/lib/dns/rbtdb.c
index deadde73c7..6319e21c24 100644
--- a/lib/dns/rbtdb.c
+++ b/lib/dns/rbtdb.c
@@ -351,30 +351,6 @@ dns__rbtdb_setttl(dns_slabheader_t *header, dns_ttl_t newttl) {
 	}
 }
 
-static bool
-prio_type(dns_typepair_t type) {
-	switch (type) {
-	case dns_rdatatype_soa:
-	case DNS_SIGTYPE(dns_rdatatype_soa):
-	case dns_rdatatype_a:
-	case DNS_SIGTYPE(dns_rdatatype_a):
-	case dns_rdatatype_aaaa:
-	case DNS_SIGTYPE(dns_rdatatype_aaaa):
-	case dns_rdatatype_nsec:
-	case DNS_SIGTYPE(dns_rdatatype_nsec):
-	case dns_rdatatype_nsec3:
-	case DNS_SIGTYPE(dns_rdatatype_nsec3):
-	case dns_rdatatype_ns:
-	case DNS_SIGTYPE(dns_rdatatype_ns):
-	case dns_rdatatype_ds:
-	case DNS_SIGTYPE(dns_rdatatype_ds):
-	case dns_rdatatype_cname:
-	case DNS_SIGTYPE(dns_rdatatype_cname):
-		return (true);
-	}
-	return (false);
-}
-
 /*%
  * These functions allow the heap code to rank the priority of each
  * element.  It returns true if v1 happens "sooner" than v2.
diff --git a/lib/dns/rbtdb_p.h b/lib/dns/rbtdb_p.h
index cee0499a51..b28863eac7 100644
--- a/lib/dns/rbtdb_p.h
+++ b/lib/dns/rbtdb_p.h
@@ -21,6 +21,8 @@
 #include <dns/rbt.h>
 #include <dns/types.h>
 
+#include "db_p.h" /* for db_nodelock_t */
+
 /*%
  * Note that "impmagic" is not the first four bytes of the struct, so
  * ISC_MAGIC_VALID cannot be used.