From 9dfdf5d1d36f90aaa9a9d0d165d62b744dde837b Mon Sep 17 00:00:00 2001
From: David Robillard <d@drobilla.net>
Date: Sat, 6 Jan 2018 10:39:01 -0500
Subject: Fix compilation with some versions of boost

---
 ingen/AtomWriter.hpp | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'ingen')

diff --git a/ingen/AtomWriter.hpp b/ingen/AtomWriter.hpp
index 5d465706..725d4a81 100644
--- a/ingen/AtomWriter.hpp
+++ b/ingen/AtomWriter.hpp
@@ -41,6 +41,8 @@ class URIs;
 class INGEN_API AtomWriter : public Interface
 {
 public:
+	using result_type = void; ///< For boost::apply_visitor
+
 	AtomWriter(URIMap& map, URIs& uris, AtomSink& sink);
 
 	Raul::URI uri() const override {
-- 
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