diff --git a/vector_search/dns.hh b/vector_search/dns.hh
index 0fdecad062..f0edf9c1a1 100644
--- a/vector_search/dns.hh
+++ b/vector_search/dns.hh
@@ -41,6 +41,7 @@ public:
     void hosts(std::vector<seastar::sstring> hosts) {
         _addresses.clear();
         _hosts = std::move(hosts);
+        _last_refresh = {};  // reset throttle so the refresh happens immediately
         trigger_refresh();
     }