diff --git a/JavaScriptCore/runtime/JSNumberCell.cpp b/JavaScriptCore/runtime/JSNumberCell.cpp
index 5b3f3bd..0e33da6 100644
--- a/JavaScriptCore/runtime/JSNumberCell.cpp
+++ b/JavaScriptCore/runtime/JSNumberCell.cpp
@@ -24,7 +24,7 @@
 #include "JSNumberCell.h"
 
 #include "NumberObject.h"
-#include "ustring.h"
+#include "UString.h"
 
 namespace JSC {