diff --git a/libcxx/test/libcxx-03/system_reserved_names.gen.py b/libcxx/test/libcxx-03/system_reserved_names.gen.py
index a4f2928eda332..43c008823a85e 100644
--- a/libcxx/test/libcxx-03/system_reserved_names.gen.py
+++ b/libcxx/test/libcxx-03/system_reserved_names.gen.py
@@ -29,10 +29,8 @@
 {lit_header_restrictions.get(header, '')}
 {lit_header_undeprecations.get(header, '')}
 
-// UNSUPPORTED: FROZEN-CXX03-HEADERS-FIXME
-
 // This is required to detect the platform we're building for below.
-#include <__config>
+#include <__cxx03/__config>
 
 #define SYSTEM_RESERVED_NAME This name should not be used in libc++