diff --git a/src/resolve/resolved-dns-query.c b/src/resolve/resolved-dns-query.c
index 5517db149d..beb20592bd 100644
--- a/src/resolve/resolved-dns-query.c
+++ b/src/resolve/resolved-dns-query.c
@@ -13,6 +13,8 @@
 #define QUERIES_MAX 2048
 #define AUXILIARY_QUERIES_MAX 64
 
+assert_cc(AUXILIARY_QUERIES_MAX < UINT8_MAX);
+
 static int dns_query_candidate_new(DnsQueryCandidate **ret, DnsQuery *q, DnsScope *s) {
         DnsQueryCandidate *c;
 
diff --git a/src/resolve/resolved-dns-query.h b/src/resolve/resolved-dns-query.h
index fa584fe3de..be9b5fa548 100644
--- a/src/resolve/resolved-dns-query.h
+++ b/src/resolve/resolved-dns-query.h
@@ -38,7 +38,7 @@ struct DnsQuery {
          * TXT+SRV query. */
         DnsQuery *auxiliary_for;
         LIST_HEAD(DnsQuery, auxiliary_queries);
-        unsigned n_auxiliary_queries;
+        uint8_t n_auxiliary_queries;
         int auxiliary_result;
 
         /* The question, formatted in IDNA for use on classic DNS, and as UTF8 for use in LLMNR or mDNS. Note