diff --git a/libmpdvdkit2/common.h b/libmpdvdkit2/common.h
index 2cd0aab8e2..f3a60185ee 100644
--- a/libmpdvdkit2/common.h
+++ b/libmpdvdkit2/common.h
@@ -29,6 +29,10 @@
  *****************************************************************************/
 #include <inttypes.h>
 
+#ifdef __CYGWIN__
+#define SYS_CYGWIN
+#endif
+
 #if defined( WIN32 )
 
 #ifndef PATH_MAX
diff --git a/libmpdvdkit2/libdvdcss.c b/libmpdvdkit2/libdvdcss.c
index 32bfbfcfd4..5ff407678f 100644
--- a/libmpdvdkit2/libdvdcss.c
+++ b/libmpdvdkit2/libdvdcss.c
@@ -113,10 +113,6 @@
 #include "ioctl.h"
 #include "device.h"
 
-#ifdef __CYGWIN__
-#define SYS_CYGWIN
-#endif
-
 #ifndef HAVE_MPLAYER
  #include "get_path.c"
 #else