diff --git a/LICENSE b/LICENSE
index b3e3bc0..c121954 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2018, Přemysl Eric Janouch <p@janouch.name>
+Copyright (c) 2018 - 2021, Přemysl Eric Janouch <p@janouch.name>
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted.
diff --git a/hswg/main.go b/hswg/main.go
index 6cec971..e4b557f 100644
--- a/hswg/main.go
+++ b/hswg/main.go
@@ -78,9 +78,9 @@ func Render(r io.Reader, config configuration.Configuration) (
 
 	var doc types.Document
 	if doc, err = parser.ParseDocument(pr, config); err == nil {
-		problems, err := validator.Validate(&doc)
-		if err != nil {
-			fmt.Fprintln(os.Stderr, err)
+		problems, verr := validator.Validate(&doc)
+		if verr != nil {
+			fmt.Fprintln(os.Stderr, verr)
 		}
 		for _, problem := range problems {
 			fmt.Fprintln(os.Stderr, problem.Message)