diff --git a/lib/Openledrace-lib/olr-lib.h b/lib/Openledrace-lib/olr-lib.h
index 9ae8a03..42b29c5 100644
--- a/lib/Openledrace-lib/olr-lib.h
+++ b/lib/Openledrace-lib/olr-lib.h
@@ -1,4 +1,3 @@
-
 #ifndef _OLR_LIB_h
 #define _OLR_LIB_h                   
 
@@ -13,6 +12,8 @@ extern "C"{
 #include "olr-controller.h"
 #include "olr-param.h"
 
+#define SPD_MIN_TRACK_AUX       0.8
+
 enum stcoin{ 
   COIN_RESET = -2,
   COIN_WAIT  = -1,