1 files changed, 1 insertions, 0 deletions

diff --git a/firmware/usbstack/usb_storage.c b/firmware/usbstack/usb_storage.c
index 85a0e2b843..c51b0faa4c 100644
--- a/firmware/usbstack/usb_storage.c
+++ b/firmware/usbstack/usb_storage.c
@@ -753,6 +753,7 @@ static void handle_scsi(struct command_block_wrapper* cbw)
     unsigned int block_size_mult = 1;
 
     if(letoh32(cbw->signature) != CBW_SIGNATURE) {
+        logf("ums: bad cbw signature (%x)", cbw->signature);
         usb_drv_stall(ep_in, true,true);
         usb_drv_stall(ep_out, true,false);
         return;