diff --git a/include/DataFile.h b/include/DataFile.h
index 6f01ffc5e..c8586fd9d 100644
--- a/include/DataFile.h
+++ b/include/DataFile.h
@@ -58,6 +58,10 @@ public:
 
 	virtual ~DataFile();
 
+	///
+	/// \brief validate
+	/// performs basic validation, compared to file extension.
+	///
 	bool validate( QString extension );
 
 	QString nameWithExtension( const QString& fn ) const;