diff --git a/src/config.h.in b/src/config.h.in
index e157939..422fd1f 100644
--- a/src/config.h.in
+++ b/src/config.h.in
@@ -439,3 +439,6 @@
 
 /* Define if fcntl()'s F_SETFD command knows about FD_CLOEXEC */
 #undef HAVE_FD_CLOEXEC
+
+/* Define if you want Cygwin to use the WIN32 clipboard, not compatible with X11*/
+#undef FEAT_CYGWIN_WIN32_CLIPBOARD