diff --git a/Sources/Plasma/NucleusLib/pnInputCore/plOSMsg.h b/Sources/Plasma/NucleusLib/pnInputCore/plOSMsg.h
index 0e6b630c..0ee37d41 100644
--- a/Sources/Plasma/NucleusLib/pnInputCore/plOSMsg.h
+++ b/Sources/Plasma/NucleusLib/pnInputCore/plOSMsg.h
@@ -42,7 +42,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #ifndef plOSMsg_inc
 #define plOSMsg_inc
 
-#include <windows.h>
+#include "hsWindows.h"
 
 //
 // This enum wraps all of the OS messages
diff --git a/Sources/Plasma/PubUtilLib/plInputCore/plInputManager.h b/Sources/Plasma/PubUtilLib/plInputCore/plInputManager.h
index 47ee9cb4..4211f948 100644
--- a/Sources/Plasma/PubUtilLib/plInputCore/plInputManager.h
+++ b/Sources/Plasma/PubUtilLib/plInputCore/plInputManager.h
@@ -44,7 +44,7 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 #ifndef PL_INPUT_MANAGER_H
 #define PL_INPUT_MANAGER_H
 
-#include <windows.h>
+#include "hsWindows.h"
 #include "hsTypes.h"
 #include "hsTemplates.h"
 #include "pnKeyedObject/hsKeyedObject.h"