diff --git a/dlls/winealsa.drv/midi.c b/dlls/winealsa.drv/midi.c
index 84f194055eb..eecb40674ae 100644
--- a/dlls/winealsa.drv/midi.c
+++ b/dlls/winealsa.drv/midi.c
@@ -574,6 +574,7 @@ static DWORD midAddBuffer(WORD wDevID, LPMIDIHDR lpMidiHdr, DWORD dwSize)
     if (!(lpMidiHdr->dwFlags & MHDR_PREPARED)) return MIDIERR_UNPREPARED;
 
     EnterCriticalSection(&crit_sect);
+    lpMidiHdr->dwFlags |= MHDR_INQUEUE;
     if (MidiInDev[wDevID].lpQueueHdr == 0) {
 	MidiInDev[wDevID].lpQueueHdr = lpMidiHdr;
     } else {