diff --git a/llarp/dns/server.hpp b/llarp/dns/server.hpp
index 25ca58aaa..446e00852 100644
--- a/llarp/dns/server.hpp
+++ b/llarp/dns/server.hpp
@@ -15,6 +15,8 @@ namespace llarp
     /// handler of dns query hooking
     struct IQueryHandler
     {
+      virtual ~IQueryHandler() = 0;
+
       /// return true if we should hook this message
       virtual bool
       ShouldHookDNSMessage(const Message& msg) const = 0;