diff --git a/spectrogramplot.cpp b/spectrogramplot.cpp
index fb14fd8..a05255b 100644
--- a/spectrogramplot.cpp
+++ b/spectrogramplot.cpp
@@ -45,11 +45,6 @@ SpectrogramPlot::SpectrogramPlot(SampleSource<std::complex<float>> *src)
 
 }
 
-SpectrogramPlot::~SpectrogramPlot()
-{
-    delete fft;
-}
-
 void SpectrogramPlot::paintMid(QPainter &painter, QRect &rect, range_t<off_t> sampleRange)
 {
     if (!inputSource || inputSource->count() == 0)
@@ -143,8 +138,7 @@ void SpectrogramPlot::setSampleRate(int rate)
 void SpectrogramPlot::setFFTSize(int size)
 {
     fftSize = size;
-    delete fft;
-    fft = new FFT(fftSize);
+    fft.reset(new FFT(fftSize));
 
     window.reset(new float[fftSize]);
     for (int i = 0; i < fftSize; i++) {
diff --git a/spectrogramplot.h b/spectrogramplot.h
index 48cb30e..4a067c0 100644
--- a/spectrogramplot.h
+++ b/spectrogramplot.h
@@ -38,7 +38,6 @@ class SpectrogramPlot : public Plot
 
 public:
     SpectrogramPlot(SampleSource<std::complex<float>> *src);
-    ~SpectrogramPlot();
 
     void paintMid(QPainter &painter, QRect &rect, range_t<off_t> sampleRange);
 
@@ -66,7 +65,7 @@ private:
     const int linesPerGraduation = 50;
     const int tileSize = 65536; // This must be a multiple of the maximum FFT size
 
-    FFT *fft = nullptr;
+    std::unique_ptr<FFT> fft;
     std::unique_ptr<float[]> window;
     fftwf_complex *lineBuffer = nullptr;
     QCache<TileCacheKey, QPixmap> pixmapCache;