diff --git a/Source/WaveshaperChart.h b/Source/WaveshaperChart.h
index 14d860a..18ece28 100644
--- a/Source/WaveshaperChart.h
+++ b/Source/WaveshaperChart.h
@@ -9,12 +9,14 @@
 #ifndef WaveshaperChart_h
 #define WaveshaperChart_h
 #endif /* WaveshaperChart_h */
+#define _USE_MATH_DEFINES
 
 #pragma once
 #include <JuceHeader.h>
 #include "SineWaveVoice.h"
 
 
+
 class WaveshaperChart  : public Component
 {
 public: