diff --git a/src/core/ngx_resolver.c b/src/core/ngx_resolver.c
index 6d129e5..b3947f5 100644
--- a/src/core/ngx_resolver.c
+++ b/src/core/ngx_resolver.c
@@ -1389,6 +1389,7 @@
 
         rec->tcp->data = rec;
         rec->tcp->write->handler = ngx_resolver_tcp_write;
+        rec->tcp->write->cancelable = 1;
         rec->tcp->read->handler = ngx_resolver_tcp_read;
         rec->tcp->read->resolver = 1;