diff --git a/src/os_unix.c b/src/os_unix.c
index cbd8ba8..a6f3a6c 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -6341,7 +6341,7 @@
 	FD_ZERO(&wfds);
 	FD_ZERO(&efds);
 	FD_SET(fd, &rfds);
-# if !defined(__QNX__) && !defined(__CYGWIN32__)
+# ifndef __QNX__
 	// For QNX select() always returns 1 if this is set.  Why?
 	FD_SET(fd, &efds);
 # endif