1 files changed, 1 insertions, 1 deletions

diff --git a/thread.h b/thread.h
index f902d7e..be1bcd5 100644
--- a/thread.h
+++ b/thread.h
@@ -30,7 +30,7 @@
 #ifndef _THREAD_H_
 #define _THREAD_H_
 
-#ifdef CYGWIN
+#ifdef __CYGWIN__
 
 #ifndef HAVE_UNION_SEMUN
 union semun