diff --git a/src/brpc/parallel_channel.cpp b/src/brpc/parallel_channel.cpp
index 130712bfb9..66b8f0cb75 100644
--- a/src/brpc/parallel_channel.cpp
+++ b/src/brpc/parallel_channel.cpp
@@ -724,6 +724,9 @@ void ParallelChannel::CallMethod(
             ParallelChannelDone::SubDone* sd = d->sub_done(j++);
             // Forward the attachment to each sub call
             sd->cntl.request_attachment().append(cntl->request_attachment());
+            if (PROTOCOL_HTTP == cntl->request_protocol()) {
+                sd->cntl.http_request() = cntl->http_request();
+            }
             _chans[i].chan->CallMethod(sd->ap.method, &sd->cntl,
                                        sd->ap.request, sd->ap.response, sd);
         }
diff --git a/src/brpc/selective_channel.cpp b/src/brpc/selective_channel.cpp
index ec93354121..00810b04ed 100644
--- a/src/brpc/selective_channel.cpp
+++ b/src/brpc/selective_channel.cpp
@@ -344,7 +344,9 @@ int Sender::IssueRPC(int64_t start_realtime_us) {
     sub_cntl->set_request_code(_main_cntl->request_code());
     // Forward request attachment to the subcall
     sub_cntl->request_attachment().append(_main_cntl->request_attachment());
-    sub_cntl->http_request() = _main_cntl->http_request();
+    if (PROTOCOL_HTTP == _main_cntl->request_protocol()) {
+        sub_cntl->http_request() = _main_cntl->http_request();
+    }
 
     sel_out.channel()->CallMethod(_main_cntl->_method,
                                   &r.sub_done->_cntl,