diff --git a/src/convert_kg_to_ton.h b/src/convert_kg_to_ton.h
index 01f9369..cc38ea6 100644
--- a/src/convert_kg_to_ton.h
+++ b/src/convert_kg_to_ton.h
@@ -5,6 +5,12 @@
 
 
 
+// Convert kilograms to tons
+// Parameters:
+//   kilograms: weight in kilograms
+// Returns:
+//   The equivalent weight in tons
+
 double kg_to_tons(double kilograms);