diff --git a/Sources/Plasma/CoreLib/hsStringTokenizer.h b/Sources/Plasma/CoreLib/hsStringTokenizer.h
index ae93a324..c562eb4c 100644
--- a/Sources/Plasma/CoreLib/hsStringTokenizer.h
+++ b/Sources/Plasma/CoreLib/hsStringTokenizer.h
@@ -29,6 +29,11 @@ You can contact Cyan Worlds, Inc. by email legal@cyan.com
 
 #include "hsTypes.h"
 
+#ifndef HS_BUILD_FOR_WIN32
+#include <wchar.h>
+#include <wctype.h>
+#endif
+
 class hsStringTokenizer 
 {
 private: