1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/scsi/st.h b/drivers/scsi/st.h
index 50f3deb1f9ed..6c8075712974 100644
--- a/drivers/scsi/st.h
+++ b/drivers/scsi/st.h
@@ -3,6 +3,7 @@
 #define _ST_H
 
 #include <linux/completion.h>
+#include <linux/mutex.h>
 #include <linux/kref.h>
 #include <scsi/scsi_cmnd.h>
 
@@ -98,7 +99,7 @@ struct st_partstat {
 struct scsi_tape {
         struct scsi_driver *driver;
         struct scsi_device *device;
-        struct semaphore lock;  /* For serialization */
+        struct mutex lock;      /* For serialization */
         struct completion wait; /* For SCSI commands */
         struct st_buffer *buffer;