diff --git a/telem.c b/telem.c
index e6bb8714..a7f9297c 100644
--- a/telem.c
+++ b/telem.c
@@ -1,6 +1,8 @@
 /*
  *  Displays voltage and current sensors for CubeSatSim
  *
+ *  uses python3 code voltagecurrenty.py
+ *
  */
 
 #include <fcntl.h>