diff --git a/nsock/src/engine_poll.c b/nsock/src/engine_poll.c
index e4f42a94b..bba1f5045 100644
--- a/nsock/src/engine_poll.c
+++ b/nsock/src/engine_poll.c
@@ -59,8 +59,6 @@
 #define _GNU_SOURCE
 #endif
 
-#include <errno.h>
-
 #ifdef HAVE_CONFIG_H
 #include "nsock_config.h"
 #elif WIN32
@@ -69,6 +67,8 @@
 
 #if HAVE_POLL
 
+#include <errno.h>
+
 #ifndef WIN32
 #include <poll.h>
 #else