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-rw-r--r--ingen/Interface.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/ingen/Interface.hpp b/ingen/Interface.hpp
index e22add9a..2221f8f0 100644
--- a/ingen/Interface.hpp
+++ b/ingen/Interface.hpp
@@ -47,6 +47,8 @@ class Atom;
class INGEN_API Interface
{
public:
+ using result_type = void;
+
Interface() : _seq(0) {}
virtual ~Interface() = default;