diff --git a/drivers/scsi/3w-xxxx.h b/drivers/scsi/3w-xxxx.h
index 4f81fc3..31fe5ea 100644
--- a/drivers/scsi/3w-xxxx.h
+++ b/drivers/scsi/3w-xxxx.h
@@ -420,7 +420,7 @@
 	u32			max_sector_count;
 	u32			aen_count;
 	struct Scsi_Host	*host;
-	struct semaphore	ioctl_sem;
+	struct mutex		ioctl_lock;
 	unsigned short		aen_queue[TW_Q_LENGTH];
 	unsigned char		aen_head;
 	unsigned char		aen_tail;