diff --git a/Implementation.md b/Implementation.md
index 1c45113..10d6dfd 100644
--- a/Implementation.md
+++ b/Implementation.md
@@ -295,7 +295,8 @@ To allow passing these additional values an extended judge interface can be
 implemented:
 
 - Parameters: There are two mandatory positional parameters which have to be
-  files for comparison
+  files for comparison, first one is expected output, second one result from
+  tested program
 - Results:
     - _comparison OK_
 		- exitcode: 0