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-rw-r--r--libs/ardour/ardour/audio_unit.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/libs/ardour/ardour/audio_unit.h b/libs/ardour/ardour/audio_unit.h
index 9fbc188562..6d2b2410fd 100644
--- a/libs/ardour/ardour/audio_unit.h
+++ b/libs/ardour/ardour/audio_unit.h
@@ -96,7 +96,7 @@ class AUPlugin : public ARDOUR::Plugin
int set_state(const XMLNode& node);
bool save_preset (std::string name);
- bool load_preset (const std::string preset_label);
+ bool load_preset (const std::string& preset_label);
std::vector<std::string> get_presets ();
std::string current_preset() const;