diff --git a/main/network.c b/main/network.c
index 613c070c283..7a066392d8a 100644
--- a/main/network.c
+++ b/main/network.c
@@ -1147,7 +1147,9 @@ PHPAPI int php_poll2(php_pollfd *ufds, unsigned int nfds, int timeout)
 		tv.tv_sec = timeout / 1000;
 		tv.tv_usec = (timeout - (tv.tv_sec * 1000)) * 1000;
 	}
+#ifndef PHP_WIN32
 	errno = 0;
+#endif
 	n = select(max_fd + 1, &rset, &wset, &eset, timeout >= 0 ? &tv : NULL);
 
 	if (n >= 0) {