diff --git a/src/i_winmusic.c b/src/i_winmusic.c
index d1b3450a..242a47ce 100644
--- a/src/i_winmusic.c
+++ b/src/i_winmusic.c
@@ -1451,6 +1451,7 @@ static void I_WIN_ShutdownMusic(void)
 
     if (buffer.data)
     {
+        MidiStreamHdr.dwFlags &= ~MHDR_INQUEUE;
         mmr = midiOutUnprepareHeader((HMIDIOUT)hMidiStream, &MidiStreamHdr,
                                      sizeof(MIDIHDR));
         if (mmr != MMSYSERR_NOERROR)