diff --git a/legislature/models.py b/legislature/models.py
index 229e37a28bbba463f845d36c8fa456b29b4b9ec5..88f589fb10de93402d6307be548b01f6fb0a1bff 100644
--- a/legislature/models.py
+++ b/legislature/models.py
@@ -34,7 +34,7 @@ from core.utils import create_child_instance_from_parent
 class MemopolRepresentative(Representative):
     country = models.ForeignKey(Country, null=True)
     score = models.IntegerField(default=0)
-    main_mandate = models.ForeignKey(Mandate, null=True, default=True)
+    main_mandate = models.ForeignKey(Mandate, null=True, default=None)
 
     def update_score(self):
         score = 0