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-rw-r--r--src/core/bell.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/src/core/bell.h b/src/core/bell.h
index 5a75da43..adb19cc4 100644
--- a/src/core/bell.h
+++ b/src/core/bell.h
@@ -38,6 +38,9 @@
#include "display-private.h"
#include "frame-private.h"
+#ifndef __BELL_H__
+#define __BELL_H__
+
#ifdef HAVE_XKB
/**
* Gives the user some kind of visual bell; in fact, this is our response
@@ -106,3 +109,5 @@ void meta_bell_shutdown (MetaDisplay *display);
* \param frame The frame which is being destroyed
*/
void meta_bell_notify_frame_destroy (MetaFrame *frame);
+
+#endif /* __BELL_H__ */