diff --git a/src/sound/i_musicinterns.h b/src/sound/i_musicinterns.h
index 9679fec934..b7acf60b75 100644
--- a/src/sound/i_musicinterns.h
+++ b/src/sound/i_musicinterns.h
@@ -198,7 +198,7 @@ protected:
 class MIDIWaveWriter : public SoftSynthMIDIDevice
 {
 public:
-	MIDIWaveWriter(const char *filename, MIDIDevice *devtouse);
+	MIDIWaveWriter(const char *filename, SoftSynthMIDIDevice *devtouse);
 	~MIDIWaveWriter();
 	int Resume();
 	int Open(MidiCallback cb, void *userdata)
diff --git a/src/sound/mididevices/music_wavewriter_mididevice.cpp b/src/sound/mididevices/music_wavewriter_mididevice.cpp
index 1f109aea2c..99590ee883 100644
--- a/src/sound/mididevices/music_wavewriter_mididevice.cpp
+++ b/src/sound/mididevices/music_wavewriter_mididevice.cpp
@@ -87,11 +87,11 @@ struct FmtChunk
 //
 //==========================================================================
 
-MIDIWaveWriter::MIDIWaveWriter(const char *filename, MIDIDevice *playdevice)
-	: SoftSynthMIDIDevice(playDevice->GetSampleRate())
+MIDIWaveWriter::MIDIWaveWriter(const char *filename, SoftSynthMIDIDevice *playdevice)
+	: SoftSynthMIDIDevice(playdevice->GetSampleRate())
 {
 	File = FileWriter::Open(filename);
-	playDevice = (SoftSynthMIDIDevice*) playdevice;
+	playDevice = playdevice;
 	if (File != nullptr)
 	{ // Write wave header
 		uint32_t work[3];
diff --git a/src/sound/musicformats/music_midistream.cpp b/src/sound/musicformats/music_midistream.cpp
index 2b4e1c34e5..873f9d92f5 100644
--- a/src/sound/musicformats/music_midistream.cpp
+++ b/src/sound/musicformats/music_midistream.cpp
@@ -319,8 +319,13 @@ bool MIDIStreamer::DumpWave(const char *filename, int subsong, int samplerate)
 
 	assert(MIDI == NULL);
 	auto devtype = SelectMIDIDevice(DeviceType);
+	if (devtype == MDEV_MMAPI)
+	{
+		Printf("MMAPI device is not supported");
+		return false;
+	}
 	MIDI = CreateMIDIDevice(devtype, samplerate);
-	MIDI = new MIDIWaveWriter(filename, MIDI);
+	MIDI = new MIDIWaveWriter(filename, reinterpret_cast<SoftSynthMIDIDevice *>(MIDI));
 	return InitPlayback();
 }