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-rw-r--r--src/req.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/req.cpp b/src/req.cpp
index f495492..503f221 100644
--- a/src/req.cpp
+++ b/src/req.cpp
@@ -49,7 +49,7 @@ int zmq::req_t::xsend (zmq_msg_t *msg_, int flags_)
zmq_msg_t prefix;
int rc = zmq_msg_init (&prefix);
zmq_assert (rc == 0);
- prefix.flags = ZMQ_MSG_MORE;
+ prefix.flags |= ZMQ_MSG_MORE;
rc = xreq_t::xsend (&prefix, flags_);
if (rc != 0)
return rc;