diff --git a/examples/Audio/SimpleFFTDemo.h b/examples/Audio/SimpleFFTDemo.h
index bdffbd2028..897f8619c3 100644
--- a/examples/Audio/SimpleFFTDemo.h
+++ b/examples/Audio/SimpleFFTDemo.h
@@ -164,13 +164,15 @@ public:
         // show up the detail clearly
         auto maxLevel = FloatVectorOperations::findMinAndMax (fftData, fftSize / 2);
 
+        Image::BitmapData bitmap { spectrogramImage, rightHandEdge, 0, 1, imageHeight, Image::BitmapData::writeOnly };
+
         for (auto y = 1; y < imageHeight; ++y)
         {
             auto skewedProportionY = 1.0f - std::exp (std::log ((float) y / (float) imageHeight) * 0.2f);
             auto fftDataIndex = jlimit (0, fftSize / 2, (int) (skewedProportionY * (int) fftSize / 2));
             auto level = jmap (fftData[fftDataIndex], 0.0f, jmax (maxLevel.getEnd(), 1e-5f), 0.0f, 1.0f);
 
-            spectrogramImage.setPixelAt (rightHandEdge, y, Colour::fromHSV (level, 1.0f, level, 1.0f));
+            bitmap.setPixelColour (0, y, Colour::fromHSV (level, 1.0f, level, 1.0f));
         }
     }