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-rw-r--r--src/audioinputengine.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/audioinputengine.h b/src/audioinputengine.h
index 105db49..1701864 100644
--- a/src/audioinputengine.h
+++ b/src/audioinputengine.h
@@ -38,7 +38,7 @@ class AudioInputEngine {
public:
virtual ~AudioInputEngine() {}
- virtual bool isMidiEngine() { return false; }
+ virtual bool isMidiEngine() const { return false; }
virtual bool init(const Instruments& instruments) = 0;