diff --git a/Sources/Tools/MaxMain/GlobalUtility.cpp b/Sources/Tools/MaxMain/GlobalUtility.cpp
index 06e32b48..4798387e 100644
--- a/Sources/Tools/MaxMain/GlobalUtility.cpp
+++ b/Sources/Tools/MaxMain/GlobalUtility.cpp
@@ -48,6 +48,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #include "plMaxNode.h"
 
 #include <guplib.h>
+#include <notify.h>
 #pragma hdrstop
 
 #include "GlobalUtility.h"
diff --git a/Sources/Tools/MaxMain/plActionTableMgr.h b/Sources/Tools/MaxMain/plActionTableMgr.h
index 4097c68b..d15ce01a 100644
--- a/Sources/Tools/MaxMain/plActionTableMgr.h
+++ b/Sources/Tools/MaxMain/plActionTableMgr.h
@@ -50,6 +50,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 
 class ActionCallback;
 struct ActionDescription;
+struct NotifyInfo;
 
 typedef bool(*ActionCallbackFunc)(int);