Index: src/music/dmusic.cpp
===================================================================
--- src/music/dmusic.cpp	(wersja 25619)
+++ src/music/dmusic.cpp	(kopia robocza)
@@ -22,6 +22,9 @@
 #include "dmusic.h"
 
 #include <windows.h>
+#ifdef FACILITY_DIRECTMUSIC
+	#undef FACILITY_DIRECTMUSIC // disable definition from <winerror.h> so <dmerror.h> can be included without warnings
+#endif
 #include <dmksctrl.h>
 #include <dmusici.h>
 #include <dmusicc.h>