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-rw-r--r--include/linux/sound.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/sound.h b/include/linux/sound.h
index 44dcf057043..fae20ba01fb 100644
--- a/include/linux/sound.h
+++ b/include/linux/sound.h
@@ -1,3 +1,5 @@
+#ifndef _LINUX_SOUND_H
+#define _LINUX_SOUND_H
/*
* Minor numbers for the sound driver.
@@ -42,3 +44,5 @@ extern void unregister_sound_mixer(int unit);
extern void unregister_sound_midi(int unit);
extern void unregister_sound_dsp(int unit);
#endif /* __KERNEL__ */
+
+#endif /* _LINUX_SOUND_H */