diff --git a/src/core/sdk/ISpectrumVisualizer.h b/src/core/sdk/ISpectrumVisualizer.h
index d30de75fa..c94681650 100644
--- a/src/core/sdk/ISpectrumVisualizer.h
+++ b/src/core/sdk/ISpectrumVisualizer.h
@@ -42,7 +42,7 @@ namespace musik { namespace core { namespace audio {
     class ISpectrumVisualizer : public IVisualizer {
     public:
         virtual void Destroy() = 0;
-        virtual bool Write(float *spectrum, int size) = 0;
+        virtual void Write(float *spectrum, int size) = 0;
     };
 
 } } }