diff --git a/app/converter/converter.go b/app/converter/converter.go
index 1756dee7..232229c9 100644
--- a/app/converter/converter.go
+++ b/app/converter/converter.go
@@ -19,6 +19,7 @@ type Converter struct {
 	workingDir string
 }
 
+// NoFileToConvertError is raided when a request has not file attached to it.
 type NoFileToConvertError struct{}
 
 const noFileToConvertErrorMessage = "No file to convert"