diff -urN SDL_mixer-1.2.6-orig/native_midi/native_midi_mac.c SDL_mixer-1.2.6/native_midi/native_midi_mac.c
--- SDL_mixer-1.2.6-orig/native_midi/native_midi_mac.c	2004-12-15 22:20:14.000000000 -0700
+++ SDL_mixer-1.2.6/native_midi/native_midi_mac.c	2006-01-04 16:49:58.000000000 -0700
@@ -591,8 +591,12 @@
 		qtma_StuffGeneralEvent(*myPos1, *myPos2, part, kGeneralEventNoteRequest, kNoteRequestEventLength);
 		myNoteRequest = (NoteRequest *)(myPos1 + 1);
 		myNoteRequest->info.flags = 0;
-		myNoteRequest->info.polyphony = part_poly_max[part];
-		myNoteRequest->info.typicalPolyphony = 0x00010000;
+		BigEndianShort bes;
+		bes.bigEndianValue = part_poly_max[part];
+		myNoteRequest->info.polyphony = bes;
+		BigEndianFixed bef;
+		bef.bigEndianValue = 0x00010000;
+		myNoteRequest->info.typicalPolyphony = bef;
 		myErr = NAStuffToneDescription(myNoteAllocator,part_to_inst[part],&myNoteRequest->tone);
 		if (myErr != noErr)
 			goto bail;