diff --git a/source/samples/MicrophoneTest.cpp b/source/samples/MicrophoneTest.cpp
index c696ac10..cd8f1fc2 100644
--- a/source/samples/MicrophoneTest.cpp
+++ b/source/samples/MicrophoneTest.cpp
@@ -1,10 +1,10 @@
-#include <stdio.h>
 #include "MicroBit.h"
 #include "SerialStreamer.h"
 #include "StreamNormalizer.h"
 #include "LevelDetector.h"
 #include "LevelDetectorSPL.h"
 #include "Tests.h"
+#include <stdio.h>
 
 static NRF52ADCChannel *mic = NULL;
 static SerialStreamer *streamer = NULL;