diff --git a/src/music/dmusic.h b/src/music/dmusic.h
--- a/src/music/dmusic.h
+++ b/src/music/dmusic.h
@@ -22,7 +22,7 @@ public:
 
 class FMusicDriver_DMusic: public MusicDriverFactory<FMusicDriver_DMusic> {
 public:
-	static const int priorty = 10;
+	static const int priority = 10;
 	/* virtual */ const char *GetName() { return "dmusic"; }
 	/* virtual */ const char *GetDescription() { return "DirectMusic MIDI Driver"; }
 	/* virtual */ Driver *CreateInstance() { return new MusicDriver_DMusic(); }
diff --git a/src/music/qtmidi.h b/src/music/qtmidi.h
--- a/src/music/qtmidi.h
+++ b/src/music/qtmidi.h
@@ -22,7 +22,7 @@ public:
 
 class FMusicDriver_QtMidi: public MusicDriverFactory<FMusicDriver_QtMidi> {
 public:
-	static const int priorty = 10;
+	static const int priority = 10;
 	/* virtual */ const char *GetName() { return "qt"; }
 	/* virtual */ const char *GetDescription() { return "QuickTime MIDI Driver"; }
 	/* virtual */ Driver *CreateInstance() { return new MusicDriver_QtMidi(); }
diff --git a/src/music/win32_m.h b/src/music/win32_m.h
--- a/src/music/win32_m.h
+++ b/src/music/win32_m.h
@@ -22,7 +22,7 @@ public:
 
 class FMusicDriver_Win32: public MusicDriverFactory<FMusicDriver_Win32> {
 public:
-	static const int priorty = 5;
+	static const int priority = 5;
 	/* virtual */ const char *GetName() { return "win32"; }
 	/* virtual */ const char *GetDescription() { return "Win32 Music Driver"; }
 	/* virtual */ Driver *CreateInstance() { return new MusicDriver_Win32(); }
diff --git a/src/video/win32_v.h b/src/video/win32_v.h
--- a/src/video/win32_v.h
+++ b/src/video/win32_v.h
@@ -22,6 +22,7 @@ public:
 
 class FVideoDriver_Win32: public VideoDriverFactory<FVideoDriver_Win32> {
 public:
+	static const int priority = 10;
 	/* virtual */ const char *GetName() { return "win32"; }
 	/* virtual */ const char *GetDescription() { return "Win32 GDI Video Driver"; }
 	/* virtual */ Driver *CreateInstance() { return new VideoDriver_Win32(); }