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-rw-r--r--generic/tk.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/generic/tk.h b/generic/tk.h
index 6931973..c7ad54b 100644
--- a/generic/tk.h
+++ b/generic/tk.h
@@ -92,7 +92,7 @@ extern "C" {
#ifndef RC_INVOKED
-#ifndef _XLIB_H
+#if !defined(_XLIB_H) && !defined(_X11_XLIB_H_)
# include <X11/Xlib.h>
# ifdef MAC_OSX_TK
# include <X11/X.h>