diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 5bf4add..b9a70a0 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -1638,7 +1638,7 @@
 	}
 #ifdef Py_USING_UNICODE
 	else if (PyUnicode_Check(sep_obj))
-		return PyUnicode_Partition((PyObject *) self, sep_obj);
+		return PyUnicode_RPartition((PyObject *) self, sep_obj);
 #endif
 	else if (PyObject_AsCharBuffer(sep_obj, &sep, &sep_len))
 		return NULL;