diff --git a/eve_api/evolutions/total-sp.py b/eve_api/evolutions/total-sp.py
index 8f1b5f1..b0412dd 100644
--- a/eve_api/evolutions/total-sp.py
+++ b/eve_api/evolutions/total-sp.py
@@ -2,6 +2,6 @@ from django_evolution.mutations import *
 from django.db import models
 
 MUTATIONS = [
-    AddField('EVEPlayerCharacter', 'total_sp', models.IntegerField, initial=0)
+    AddField('EVEPlayerCharacter', 'total_sp', models.IntegerField, null=True)
 ]