diff --git a/include/haproxy/server-t.h b/include/haproxy/server-t.h
index c2c3238ef..bf4d4c9b6 100644
--- a/include/haproxy/server-t.h
+++ b/include/haproxy/server-t.h
@@ -630,7 +630,7 @@ struct server_inetaddr_updater {
 		struct {
 			unsigned int ns_id; // nameserver id responsible for the update
 		} dns_resolver;             // SERVER_INETADDR_UPDATER_DNS_RESOLVER specific infos
-	};                                  // per updater's additional ctx
+	} u;                                // per updater's additional ctx
 };
 #define SERVER_INETADDR_UPDATER_NONE                                           \
  (struct server_inetaddr_updater){ .by = SERVER_INETADDR_UPDATER_BY_NONE,      \
@@ -656,7 +656,7 @@ struct server_inetaddr_updater {
  (struct server_inetaddr_updater){                                             \
     .by = SERVER_INETADDR_UPDATER_BY_DNS_RESOLVER,                             \
     .dns = 1,                                                                  \
-    .dns_resolver.ns_id = _ns_id,                                              \
+    .u.dns_resolver.ns_id = _ns_id,                                            \
  }
 
 /* data provided to EVENT_HDL_SUB_SERVER_INETADDR handlers through
diff --git a/src/server.c b/src/server.c
index badcf3851..15731b312 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3824,7 +3824,7 @@ static void _srv_append_inetaddr_updater_info(struct buffer *out,
 				 * query
 				 */
 				BUG_ON(!r);
-				ns = find_nameserver_by_resolvers_and_id(r, updater.dns_resolver.ns_id);
+				ns = find_nameserver_by_resolvers_and_id(r, updater.u.dns_resolver.ns_id);
 				BUG_ON(!ns);
 				chunk_appendf(out, " by '%s/%s'", r->id, ns->id);
 			}