diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 4def537..d3e5283 100644
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -5635,6 +5635,7 @@
 #include "stringlib/partition.h"
 
 #define _Py_InsertThousandsGrouping _PyUnicode_InsertThousandsGrouping
+#define _Py_InsertThousandsGroupingLocale _PyUnicode_InsertThousandsGroupingLocale
 #include "stringlib/localeutil.h"
 
 /* helper macro to fixup start/end slice values */