diff --git a/lib/dns/include/dns/events.h b/lib/dns/include/dns/events.h
index a18e301bf5..016e026b64 100644
--- a/lib/dns/include/dns/events.h
+++ b/lib/dns/include/dns/events.h
@@ -33,6 +33,7 @@ ISC_LANG_BEGINDECLS
 #define DNS_EVENT_FINDDONE			(ISC_EVENTCLASS_DNS + 3)
 #define DNS_EVENT_QUERY				(ISC_EVENTCLASS_DNS + 4)
 #define DNS_EVENT_QUERYDONE			(ISC_EVENTCLASS_DNS + 5)
+#define DNS_EVENT_DISPATCH			(ISC_EVENTCLASS_DNS + 6)
 
 #define DNS_EVENT_FIRSTEVENT			(ISC_EVENTCLASS_DNS + 0)
 #define DNS_EVENT_LASTEVENT			(ISC_EVENTCLASS_DNS + 65535)