diff --git a/scripts/geodata/osm/formatter.py b/scripts/geodata/osm/formatter.py
index ac78209c..3f2d3281 100644
--- a/scripts/geodata/osm/formatter.py
+++ b/scripts/geodata/osm/formatter.py
@@ -180,7 +180,7 @@ class OSMAddressFormatter(object):
                     except (ValueError, TypeError):
                         continue
 
-                if max_floors is not None and num_floors > max_floors:
+                if max_floors is None or num_floors > max_floors:
                     max_floors = num_floors
         return max_floors