1 files changed, 4 insertions, 0 deletions
diff --git a/hal.h b/hal.h
index faf2892b4..9941c4749 100644
--- a/hal.h
+++ b/hal.h
@@ -71,6 +71,10 @@ extern const HalMusicDriver _extmidi_music_driver;
 extern const HalMusicDriver _bemidi_music_driver;
 #endif
 
+#if defined(__OS2__)
+extern const HalMusicDriver _os2_music_driver;
+#endif
+
 extern const HalVideoDriver _dedicated_video_driver;
 
 enum DriverType {