diff --git a/main.h b/main.h
index b0f9ca91..6ce6b86a 100644
--- a/main.h
+++ b/main.h
@@ -122,7 +122,7 @@ FILE *image_file;
 #define TXCOMMAND 12
 
 #define FAIL_COUNT 10
-#define FAIL_NONE 0
+#define FAIL_NONE -1
 #define FAIL_SOLAR 1
 #define FAIL_DEGRADE 2
 #define FAIL_SHORT 3