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-rw-r--r--src/zmq.cpp2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/zmq.cpp b/src/zmq.cpp
index e93f8b7..c30a6aa 100644
--- a/src/zmq.cpp
+++ b/src/zmq.cpp
@@ -539,7 +539,7 @@ int zmq_poll (zmq_pollitem_t *items_, int nitems_, long timeout_)
memcpy (&inset, &pollset_in, sizeof (fd_set));
memcpy (&outset, &pollset_out, sizeof (fd_set));
memcpy (&errset, &pollset_err, sizeof (fd_set));
- int rc = select (maxfd, &inset, &outset, &errset,
+ int rc = select (maxfd + 1, &inset, &outset, &errset,
first_pass ? &zero_timeout : (timeout_ < 0 ? NULL : &timeout));
#if defined ZMQ_HAVE_WINDOWS
wsa_assert (rc != SOCKET_ERROR);