diff --git a/scripts/geodata/addresses/po_boxes.py b/scripts/geodata/addresses/po_boxes.py
index fab90ac9..f9482b1b 100644
--- a/scripts/geodata/addresses/po_boxes.py
+++ b/scripts/geodata/addresses/po_boxes.py
@@ -25,7 +25,7 @@ class POBox(NumberedComponent):
 
     @classmethod
     def random_letter(cls, alphabet=latin_alphabet):
-        return random.choice(alphabet)
+        return sample_alphabet(alphabet)
 
     @classmethod
     def phrase(cls, box_number, language, country=None):