diff --git a/LEGO1/omni/src/audio/mxmusicmanager.cpp b/LEGO1/omni/src/audio/mxmusicmanager.cpp
index 09fbc861..7a0684f8 100644
--- a/LEGO1/omni/src/audio/mxmusicmanager.cpp
+++ b/LEGO1/omni/src/audio/mxmusicmanager.cpp
@@ -81,7 +81,7 @@ MxResult MxMusicManager::ResetStream()
 			ResetBuffer();
 		}
 
-		if (m_midiHdrP->dwFlags & (MHDR_DONE | MHDR_PREPARED)) {
+		if (m_midiHdrP->dwFlags & MHDR_DONE || m_midiHdrP->dwFlags & MHDR_PREPARED) {
 			if (midiOutUnprepareHeader((HMIDIOUT) m_midiStreamH, m_midiHdrP, sizeof(MIDIHDR)) != MMSYSERR_NOERROR)
 				goto done;