1 files changed, 2 insertions, 1 deletions

diff --git a/include/sound/opl3.h b/include/sound/opl3.h
index 83392641cb47..444907166f97 100644
--- a/include/sound/opl3.h
+++ b/include/sound/opl3.h
@@ -53,6 +53,7 @@
 
 #include "driver.h"
 #include <linux/time.h>
+#include <linux/mutex.h>
 #include "core.h"
 #include "hwdep.h"
 #include "timer.h"
@@ -312,7 +313,7 @@ struct snd_opl3 {
         int sys_timer_status;           /* system timer run status */
         spinlock_t sys_timer_lock;      /* Lock for system timer access */
 #endif
-        struct semaphore access_mutex;  /* locking */
+        struct mutex access_mutex;      /* locking */
 };
 
 /* opl3.c */