diff --git a/dota.py b/dota.py
index 8c4d5ed..cacfef2 100644
--- a/dota.py
+++ b/dota.py
@@ -66,6 +66,9 @@ class Match(BaseModel):
       'party_size': self.party_size,
       'match_id': self.match_id,
     }
+    if not self.party_size:
+      player_account_ids = [player.account_id for player in match_.players if player.account_id]
+      match_data['party_size'] = Friend.select().where(Friend.steam_id.in_(player_account_ids)).count()
     return match_data