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-rw-r--r--ingen/AtomWriter.hpp2
1 files changed, 2 insertions, 0 deletions
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 {