diff --git a/test/libcxxabi/test/config.py b/test/libcxxabi/test/config.py
index 5357bb1..f8f9927 100644
--- a/test/libcxxabi/test/config.py
+++ b/test/libcxxabi/test/config.py
@@ -60,7 +60,6 @@
         super(Configuration, self).configure_compile_flags()
 
     def configure_compile_flags_header_includes(self):
-        self.configure_config_site_header()
         cxx_headers = self.get_lit_conf('cxx_headers', None) or \
             os.path.join(self.libcxxabi_hdr_root, 'include', 'c++', 'v1')
         if cxx_headers == '':