diff --git a/src/scsi_device.c b/src/scsi_device.c
index 33e0f300e..a72daa69f 100644
--- a/src/scsi_device.c
+++ b/src/scsi_device.c
@@ -3,7 +3,9 @@
 #include "scsi_disk.h"
 #include "cdrom.h"
 
-static uint8_t scsi_null_device_sense[14] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+static uint8_t scsi_null_device_sense[14] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0 };
+
 
 static void scsi_device_target_command(int lun_type, uint8_t id, uint8_t *cdb)
 {
@@ -282,4 +284,4 @@ void scsi_device_command(int cdb_len, uint8_t scsi_id, uint8_t scsi_lun, uint8_t
 	/* Error (Check Condition) - call the phase callback to complete the command. */
 	scsi_device_target_phase_callback(lun_type, id);
     }
-}
\ No newline at end of file
+}
diff --git a/src/scsi_device.h b/src/scsi_device.h
index ee9c80691..c3cda987b 100644
--- a/src/scsi_device.h
+++ b/src/scsi_device.h
@@ -1,8 +1,34 @@
-uint8_t *scsi_device_sense(uint8_t scsi_id, uint8_t scsi_lun);
-void scsi_device_type_data(uint8_t scsi_id, uint8_t scsi_lun, uint8_t *type, uint8_t *rmb);
-int scsi_device_read_capacity(uint8_t scsi_id, uint8_t scsi_lun, uint8_t *cdb, uint8_t *buffer, uint32_t *len);
-int scsi_device_present(uint8_t scsi_id, uint8_t scsi_lun);
-int scsi_device_valid(uint8_t scsi_id, uint8_t scsi_lun);
-int scsi_device_cdb_length(uint8_t scsi_id, uint8_t scsi_lun);
-int scsi_device_block_shift(uint8_t scsi_id, uint8_t scsi_lun);
-void scsi_device_command(int cdb_len, uint8_t scsi_id, uint8_t scsi_lun, uint8_t *cdb);
+/*
+ * 86Box	A hypervisor and IBM PC system emulator that specializes in
+ *		running old operating systems and software designed for IBM
+ *		PC systems and compatibles from 1981 through fairly recent
+ *		system designs based on the PCI bus.
+ *
+ *		This file is part of the 86Box distribution.
+ *
+ *		Definitions for the generic SCSI device command handler.
+ *
+ * Version:	@(#)scsi_devic3.h	1.0.1	2017/08/21
+ *
+ * Authors:	Miran Grca, <mgrca8@gmail.com>
+ *		Fred N. van Kempen, <decwiz@yahoo.com>
+ */
+#ifndef SCSI_DEVICE_H
+# define SCSI_DEVICE_H
+
+
+extern uint8_t	*scsi_device_sense(uint8_t id, uint8_t lun);
+extern void	scsi_device_type_data(uint8_t id, uint8_t lun,
+				      uint8_t *type, uint8_t *rmb);
+extern int	scsi_device_read_capacity(uint8_t id, uint8_t lun,
+					  uint8_t *cdb, uint8_t *buffer,
+					  uint32_t *len);
+extern int	scsi_device_present(uint8_t id, uint8_t lun);
+extern int	scsi_device_valid(uint8_t id, uint8_t lun);
+extern int	scsi_device_cdb_length(uint8_t id, uint8_t lun);
+extern int	scsi_device_block_shift(uint8_t id, uint8_t lun);
+extern void	scsi_device_command(int cdb_len, uint8_t id, uint8_t lun,
+				    uint8_t *cdb);
+
+
+#endif	/*SCSI_DEVICE_H*/