diff --git a/sigi/apps/casas/models.py b/sigi/apps/casas/models.py
index 71ef475..ec012d0 100644
--- a/sigi/apps/casas/models.py
+++ b/sigi/apps/casas/models.py
@@ -84,6 +84,8 @@ class CasaLegislativa(models.Model):
         
     @property
     def num_parlamentares(self):
+        if not self.legislatura_set.exists():
+            return 0
         return self.legislatura_set.latest('data_inicio').total_parlamentares
 
     @property