diff --git a/open-led-race/olr-lib.h b/open-led-race/olr-lib.h
index 2fed95f..9bec97f 100644
--- a/open-led-race/olr-lib.h
+++ b/open-led-race/olr-lib.h
@@ -55,6 +55,7 @@ typedef struct{
     enum status st;
     bool leaving;
     float battery;
+    int charging;
 }car_t;