diff --git a/LEGO1/legoomni.cpp b/LEGO1/legoomni.cpp
index 126f8854..2bff73af 100644
--- a/LEGO1/legoomni.cpp
+++ b/LEGO1/legoomni.cpp
@@ -1,6 +1,8 @@
 #include "legoomni.h"
 
+#include "mxbackgroundaudiomanager.h"
 #include "mxdsfile.h"
+#include "legogamestate.h"
 
 // 0x100f4588
 char *g_nocdSourceName = NULL;
diff --git a/LEGO1/mxmusicmanager.cpp b/LEGO1/mxmusicmanager.cpp
index 247b6596..6f49adcc 100644
--- a/LEGO1/mxmusicmanager.cpp
+++ b/LEGO1/mxmusicmanager.cpp
@@ -1,5 +1,7 @@
 #include "mxmusicmanager.h"
+#include "mxticklemanager.h"
 #include "mxomni.h"
+
 #include <windows.h>
 
 DECOMP_SIZE_ASSERT(MxMusicManager, 0x58);
diff --git a/LEGO1/mxsoundmanager.cpp b/LEGO1/mxsoundmanager.cpp
index 16d504ce..466843e3 100644
--- a/LEGO1/mxsoundmanager.cpp
+++ b/LEGO1/mxsoundmanager.cpp
@@ -1,5 +1,5 @@
 #include "mxsoundmanager.h"
-
+#include "mxticklemanager.h"
 #include "mxomni.h"
 
 DECOMP_SIZE_ASSERT(MxSoundManager, 0x3c);