diff --git a/Lib/tools.c b/Lib/tools.c
index 8443b21..231da43 100644
--- a/Lib/tools.c
+++ b/Lib/tools.c
@@ -28,6 +28,9 @@ printf("%c\r", batons[foo&0x03]);	fflush(stdout);
 /*::------------------------------------------------------------------::*/
 /*
  *	I think that the 'chrono' system is full broken
+ *
+ *  You have to look at 'functions.c' for more timing functions.
+ *
  */
 #define NB_CHRONOS	42