1 files changed, 1 insertions, 0 deletions
diff --git a/src/ao.h b/src/ao.h
index 97cb75ae..a2dfadd0 100644
--- a/src/ao.h
+++ b/src/ao.h
@@ -110,6 +110,7 @@ ao_start_scheduler(void);
 #define AO_PANIC_STDIO		7	/* Too many stdio handlers registered */
 #define AO_PANIC_REBOOT		8	/* Reboot failed */
 #define AO_PANIC_FLASH		9	/* Invalid flash part (or wrong blocksize) */
+#define AO_PANIC_USB		10	/* Trying to send USB packet while busy */
 
 /* Stop the operating system, beeping and blinking the reason */
 void