diff --git a/Core/Inc/main.h b/Core/Inc/main.h
index ec11774..7137b0a 100644
--- a/Core/Inc/main.h
+++ b/Core/Inc/main.h
@@ -47,6 +47,8 @@ extern "C" {
 #define THRESH_UT 0     /* 0C */
 #define THRESH_OT 880   /* 55C */
 
+#define AMS_ERRORCODE_TIMEOUT_SLAVE 1
+#define AMS_ERRORCODE_SLAVE_PANIC 2
 #define AMS_ERRORCODE_TIMEOUT_SHUNT 6
 #define AMS_ERRORCODE_MASTER_THRESH 7