diff --git a/lib/rut.vala b/lib/rut.vala
index c6b4abc..33733a3 100644
--- a/lib/rut.vala
+++ b/lib/rut.vala
@@ -111,6 +111,7 @@ namespace Sernatur {
 					return 'K';
 				}
 				else {
+					// Add the '0' to convert from int to unichar
 					return (unichar) remainder + '0';
 				}
 			}