diff --git a/config.go b/config.go
index 50d88d5..909df84 100644
--- a/config.go
+++ b/config.go
@@ -79,7 +79,7 @@ func initConfig() (config, error) {
 	switch *tagFormat {
 	case formatAsIs, formatSnakeCase, formatCamelCase, formatPascalCase:
 	default:
-		return config{}, fmt.Errorf("invalid tag_format %s", *format)
+		return config{}, fmt.Errorf("invalid tag_format %s", *tagFormat)
 	}
 
 	conf := config{}
diff --git a/genutil.go b/genutil.go
index d7bcc60..e9456cc 100644
--- a/genutil.go
+++ b/genutil.go
@@ -11,11 +11,11 @@ import (
 )
 
 const (
-	templateName = "output.tpl"
+	templateName = "output.tmpl"
 )
 
 var (
-	//go:embed output.tpl
+	//go:embed output.tmpl
 	templatesFS embed.FS
 )
 
diff --git a/output.tpl b/output.tmpl
similarity index 100%
rename from output.tpl
rename to output.tmpl