diff --git a/src/convert_M_in_KM.c b/src/convert_M_in_KM.c
index 2f8b0e3..bf56016 100644
--- a/src/convert_M_in_KM.c
+++ b/src/convert_M_in_KM.c
@@ -1,7 +1,6 @@
-
 #include "convert_M_in_KM.h"
-#include <stdio.h>
-//convert length for double m into km
+
+// convert length for double metre into kilometre
 double meter_to_kilometer(double meter) {
     return meter / 1000.0;
 }