diff --git a/src/resolve/resolved-dns-stub.c b/src/resolve/resolved-dns-stub.c
index 78f7cb854f..2cfabb3629 100644
--- a/src/resolve/resolved-dns-stub.c
+++ b/src/resolve/resolved-dns-stub.c
@@ -89,15 +89,6 @@ DnsStubListenerExtra *dns_stub_listener_extra_free(DnsStubListenerExtra *p) {
         return mfree(p);
 }
 
-uint16_t dns_stub_listener_extra_port(DnsStubListenerExtra *p) {
-        assert(p);
-
-        if (p->port > 0)
-                return p->port;
-
-        return 53;
-}
-
 static void stub_packet_hash_func(const DnsPacket *p, struct siphash *state) {
         assert(p);
 
diff --git a/src/resolve/resolved-dns-stub.h b/src/resolve/resolved-dns-stub.h
index cf03d7f700..3b9bf65b21 100644
--- a/src/resolve/resolved-dns-stub.h
+++ b/src/resolve/resolved-dns-stub.h
@@ -35,7 +35,11 @@ extern const struct hash_ops dns_stub_listener_extra_hash_ops;
 
 int dns_stub_listener_extra_new(Manager *m, DnsStubListenerExtra **ret);
 DnsStubListenerExtra *dns_stub_listener_extra_free(DnsStubListenerExtra *p);
-uint16_t dns_stub_listener_extra_port(DnsStubListenerExtra *p);
+static inline uint16_t dns_stub_listener_extra_port(DnsStubListenerExtra *p) {
+        assert(p);
+
+        return p->port > 0 ? p->port : 53;
+}
 
 void manager_dns_stub_stop(Manager *m);
 int manager_dns_stub_start(Manager *m);