diff --git a/examples/obsolete/device/src/msc_device_app.c b/examples/obsolete/device/src/msc_device_app.c
index ae4b37149..7b1fb9411 100644
--- a/examples/obsolete/device/src/msc_device_app.c
+++ b/examples/obsolete/device/src/msc_device_app.c
@@ -99,7 +99,7 @@ void msc_app_umount(uint8_t rhport)
 
 }
 
-int32_t tud_msc_scsi_cb (uint8_t rhport, uint8_t lun, uint8_t scsi_cmd[16], void* buffer, uint16_t bufsize)
+int32_t tud_msc_scsi_cb (uint8_t rhport, uint8_t lun, uint8_t const scsi_cmd[16], void* buffer, uint16_t bufsize)
 {
   // read10 & write10 has their own callback and MUST not be handled here