From 57e955174496cdd16f369908c947baf11bf9e43b Mon Sep 17 00:00:00 2001
From: Bill Torpey <bill.torpey@itiviti.com>
Date: Mon, 2 Nov 2020 16:58:14 -0500
Subject: [PATCH] The _DEBUG preprocessor definition is typically only set on
 Windows.  (e.g., see
 https://stackoverflow.com/questions/2290509/debug-vs-ndebug/29253284#29253284)

---
 src/poller_base.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/poller_base.cpp b/src/poller_base.cpp
index d4cc07fa..78db28f6 100644
--- a/src/poller_base.cpp
+++ b/src/poller_base.cpp
@@ -136,7 +136,7 @@ void zmq::worker_poller_base_t::start (const char *name_)
 
 void zmq::worker_poller_base_t::check_thread () const
 {
-#ifdef _DEBUG
+#ifndef NDEBUG
     zmq_assert (!_worker.get_started () || _worker.is_current_thread ());
 #endif
 }