4 files changed, 14 insertions, 4 deletions
diff --git a/engines/sky/music/adlibchannel.cpp b/engines/sky/music/adlibchannel.cpp
index c7acb9b6c1..2f44add466 100644
--- a/engines/sky/music/adlibchannel.cpp
+++ b/engines/sky/music/adlibchannel.cpp
@@ -23,7 +23,7 @@
 
 #include "common/endian.h"
 #include "common/textconsole.h"
-#include "common/util.h"
+#include "audio/fmopl.h"
 #include "sky/music/adlibchannel.h"
 #include "sky/sky.h"
 
diff --git a/engines/sky/music/adlibchannel.h b/engines/sky/music/adlibchannel.h
index 4504e3b570..b190ba27dc 100644
--- a/engines/sky/music/adlibchannel.h
+++ b/engines/sky/music/adlibchannel.h
@@ -24,7 +24,10 @@
 #define SKY_MUSIC_ADLIBCHANNEL_H
 
 #include "sky/music/musicbase.h"
-#include "audio/fmopl.h"
+
+namespace OPL {
+class OPL;
+}
 
 namespace Sky {
 
diff --git a/engines/sky/music/adlibmusic.cpp b/engines/sky/music/adlibmusic.cpp
index be5e7b2353..1a2a91c82a 100644
--- a/engines/sky/music/adlibmusic.cpp
+++ b/engines/sky/music/adlibmusic.cpp
@@ -26,9 +26,13 @@
 
 #include "sky/music/adlibmusic.h"
 #include "sky/music/adlibchannel.h"
-#include "audio/mixer.h"
+#include "audio/fmopl.h"
 #include "sky/sky.h"
 
+namespace Audio {
+class Mixer;
+}
+
 namespace Sky {
 
 AdLibMusic::AdLibMusic(Audio::Mixer *pMixer, Disk *pDisk) : MusicBase(pMixer, pDisk) {
diff --git a/engines/sky/music/adlibmusic.h b/engines/sky/music/adlibmusic.h
index 7b51f2d3a0..ebfa038848 100644
--- a/engines/sky/music/adlibmusic.h
+++ b/engines/sky/music/adlibmusic.h
@@ -24,7 +24,10 @@
 #define SKY_MUSIC_ADLIBMUSIC_H
 
 #include "sky/music/musicbase.h"
-#include "audio/audiostream.h"
+
+namespace Audio {
+class Mixer;
+}
 
 namespace OPL {
 class OPL;