diff --git a/src/resolve/dns-type.c b/src/resolve/dns-type.c
index 63b4b36e88d..a626ecf01ac 100644
--- a/src/resolve/dns-type.c
+++ b/src/resolve/dns-type.c
@@ -45,6 +45,6 @@ int dns_type_from_string(const char *s) {
 }
 
 /* XXX: find an authoritative list of all pseudo types? */
-bool dns_type_is_pseudo(int n) {
+bool dns_type_is_pseudo(uint16_t n) {
         return IN_SET(n, DNS_TYPE_ANY, DNS_TYPE_AXFR, DNS_TYPE_IXFR, DNS_TYPE_OPT);
 }
diff --git a/src/resolve/dns-type.h b/src/resolve/dns-type.h
index 950af36ee30..2868025ad71 100644
--- a/src/resolve/dns-type.h
+++ b/src/resolve/dns-type.h
@@ -25,7 +25,7 @@
 
 const char *dns_type_to_string(int type);
 int dns_type_from_string(const char *s);
-bool dns_type_is_pseudo(int n);
+bool dns_type_is_pseudo(uint16_t n);
 
 /* DNS record types, taken from
  * http://www.iana.org/assignments/dns-parameters/dns-parameters.xhtml.