diff --git a/Objects/bytesobject.c b/Objects/bytesobject.c
index d3b598e..d5c2bea 100644
--- a/Objects/bytesobject.c
+++ b/Objects/bytesobject.c
@@ -583,6 +583,7 @@
 #include "stringlib/transmogrify.h"
 
 #define _Py_InsertThousandsGrouping _PyBytes_InsertThousandsGrouping
+#define _Py_InsertThousandsGroupingLocale _PyBytes_InsertThousandsGroupingLocale
 #include "stringlib/localeutil.h"
 
 PyObject *