diff --git a/openedx/core/djangoapps/agreements/serializers.py b/openedx/core/djangoapps/agreements/serializers.py
index 11e9d57f40..397a9ba61d 100644
--- a/openedx/core/djangoapps/agreements/serializers.py
+++ b/openedx/core/djangoapps/agreements/serializers.py
@@ -16,7 +16,7 @@ class IntegritySignatureSerializer(serializers.ModelSerializer):
     created_at = serializers.DateTimeField(source='created')
 
     class Meta:
-        model = IntegritySignature()
+        model = IntegritySignature
         fields = ('username', 'course_id', 'created_at')