diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 83219aca..024d3a2a 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -111,6 +111,7 @@
 #define PROMPT_QUERY 5
 #define PROMPT_HELP 6
 #define PROMPT_RESTART 7
+#define PROMPT_DEBUG 8
 
 #define PAYLOAD_QUERY 1
 #define PAYLOAD_RESET 2