diff --git a/src/seeder/dns.h b/src/seeder/dns.h
--- a/src/seeder/dns.h
+++ b/src/seeder/dns.h
@@ -1,6 +1,7 @@
 #ifndef BITCOIN_SEEDER_DNS_H
 #define BITCOIN_SEEDER_DNS_H 1
 
+#include <cstddef>
 #include <cstdint>
 
 struct addr_t {
@@ -24,6 +25,13 @@
     uint64_t nRequests;
 };
 
+//  0: ok
+// -1: premature end of input, forward reference, component > 63 char, invalid
+// character
+// -2: insufficient space in output
+int parse_name(const uint8_t **inpos, const uint8_t *inend,
+               const uint8_t *inbuf, char *buf, size_t bufsize);
+
 int dnsserver(dns_opt_t *opt);
 
 #endif // BITCOIN_SEEDER_DNS_H
diff --git a/src/seeder/dns.cpp b/src/seeder/dns.cpp
--- a/src/seeder/dns.cpp
+++ b/src/seeder/dns.cpp
@@ -46,12 +46,8 @@
     QTYPE_ANY = 255
 } dns_type;
 
-//  0: ok
-// -1: premature end of input, forward reference, component > 63 char, invalid
-// character
-// -2: insufficient space in output
-static int parse_name(const uint8_t **inpos, const uint8_t *inend,
-                      const uint8_t *inbuf, char *buf, size_t bufsize) {
+int parse_name(const uint8_t **inpos, const uint8_t *inend,
+               const uint8_t *inbuf, char *buf, size_t bufsize) {
     size_t bufused = 0;
     int init = 1;
     do {