diff --git a/app/models.py b/app/models.py
index 63fdc7480..a6f8c9d0f 100644
--- a/app/models.py
+++ b/app/models.py
@@ -115,12 +115,12 @@ class NotificationStatistics(db.Model):
     day = db.Column(db.String(255), nullable=False)
     service_id = db.Column(UUID(as_uuid=True), db.ForeignKey('services.id'), index=True, nullable=False)
     service = db.relationship('Service', backref=db.backref('service_notification_stats', lazy='dynamic'))
-    emails_requested = db.Column(db.BigInteger, index=False, unique=False, nullable=False)
-    emails_delivered = db.Column(db.BigInteger, index=False, unique=False, nullable=True)
-    emails_error = db.Column(db.BigInteger, index=False, unique=False, nullable=True)
-    sms_requested = db.Column(db.BigInteger, index=False, unique=False, nullable=False)
-    sms_delivered = db.Column(db.BigInteger, index=False, unique=False, nullable=True)
-    sms_error = db.Column(db.BigInteger, index=False, unique=False, nullable=True)
+    emails_requested = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
+    emails_delivered = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
+    emails_error = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
+    sms_requested = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
+    sms_delivered = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
+    sms_error = db.Column(db.BigInteger, index=False, unique=False, nullable=False, default=0)
 
     __table_args__ = (
         UniqueConstraint('service_id', 'day', name='uix_service_to_day'),
diff --git a/migrations/versions/0042_default_stats_to_zero.py b/migrations/versions/0042_default_stats_to_zero.py
new file mode 100644
index 000000000..4d862c903
--- /dev/null
+++ b/migrations/versions/0042_default_stats_to_zero.py
@@ -0,0 +1,45 @@
+"""empty message
+
+Revision ID: 0042_default_stats_to_zero
+Revises: 0041_platform_admin
+Create Date: 2016-03-17 11:09:17.906910
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0042_default_stats_to_zero'
+down_revision = '0041_platform_admin'
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.get_bind()
+    op.execute('update notification_statistics set emails_delivered = 0 where emails_delivered is Null')
+    op.execute('update notification_statistics set emails_error = 0 where emails_error is Null')
+    op.execute('update notification_statistics set sms_delivered = 0 where sms_delivered is Null')
+    op.execute('update notification_statistics set sms_error = 0 where sms_error is Null')
+    op.alter_column('notification_statistics', 'emails_requested', server_default='0')
+    op.alter_column('notification_statistics', 'emails_delivered', server_default='0', nullable=False)
+    op.alter_column('notification_statistics', 'emails_error', server_default='0', nullable=False)
+    op.alter_column('notification_statistics', 'sms_requested', server_default='0')
+    op.alter_column('notification_statistics', 'sms_delivered', server_default='0', nullable=False)
+    op.alter_column('notification_statistics', 'sms_error', server_default='0', nullable=False)
+    ### end Alembic commands ###
+
+
+def downgrade():
+    ### commands auto generated by Alembic - please adjust! ###
+    op.alter_column('notification_statistics', 'emails_requested', server_default=None)
+    op.alter_column('notification_statistics', 'emails_delivered', server_default=None, nullable=True)
+    op.alter_column('notification_statistics', 'emails_error', server_default=None, nullable=True)
+    op.alter_column('notification_statistics', 'sms_requested', server_default=None)
+    op.alter_column('notification_statistics', 'sms_delivered', server_default=None, nullable=True)
+    op.alter_column('notification_statistics', 'sms_error', server_default=None, nullable=True)
+    op.execute('update notification_statistics set emails_delivered = Null where emails_delivered = 0')
+    op.execute('update notification_statistics set emails_error = Null where emails_error = 0')
+    op.execute('update notification_statistics set sms_delivered = Null where sms_delivered = 0')
+    op.execute('update notification_statistics set sms_error = Null where sms_error = 0')
+    ### end Alembic commands ###
diff --git a/tests/app/dao/test_notification_dao.py b/tests/app/dao/test_notification_dao.py
index d6a5a95b5..badb93b57 100644
--- a/tests/app/dao/test_notification_dao.py
+++ b/tests/app/dao/test_notification_dao.py
@@ -70,8 +70,13 @@ def test_should_be_able_to_get_statistics_for_a_service(sample_template):
     assert len(stats) == 1
     assert stats[0].emails_requested == 0
     assert stats[0].sms_requested == 1
+    assert stats[0].sms_delivered == 0
+    assert stats[0].sms_error == 0
     assert stats[0].day == notification.created_at.strftime(DATE_FORMAT)
     assert stats[0].service_id == notification.service_id
+    assert stats[0].emails_requested == 0
+    assert stats[0].emails_delivered == 0
+    assert stats[0].emails_error == 0
 
 
 def test_should_be_able_to_get_statistics_for_a_service_for_a_day(sample_template):
@@ -90,7 +95,11 @@ def test_should_be_able_to_get_statistics_for_a_service_for_a_day(sample_templat
         sample_template.service.id, now.strftime(DATE_FORMAT)
     )
     assert stat.emails_requested == 0
+    assert stat.emails_error == 0
+    assert stat.emails_delivered == 0
     assert stat.sms_requested == 1
+    assert stat.sms_error == 0
+    assert stat.sms_delivered == 0
     assert stat.day == notification.created_at.strftime(DATE_FORMAT)
     assert stat.service_id == notification.service_id