diff --git a/scripts/geodata/osm/osm_address_training_data.py b/scripts/geodata/osm/osm_address_training_data.py
index 9403ecc7..7c4303e8 100644
--- a/scripts/geodata/osm/osm_address_training_data.py
+++ b/scripts/geodata/osm/osm_address_training_data.py
@@ -577,6 +577,8 @@ def build_address_format_training_data(admin_rtree, language_rtree, neighborhood
         iso_code3_key = 'ISO3166-1:alpha3'
 
         if osm_components:
+            poly_components = defaultdict(list)
+
             for component, components_values in osm_components.iteritems():
                 seen = set()