diff --git a/bigchaindb/web/views/unspents.py b/bigchaindb/web/views/unspents.py
index b3a52efe..a934be42 100644
--- a/bigchaindb/web/views/unspents.py
+++ b/bigchaindb/web/views/unspents.py
@@ -15,14 +15,14 @@ class UnspentListApi(Resource):
                 A :obj:`list` of :cls:`str` of links to unfulfilled conditions.
         """
         parser = reqparse.RequestParser()
-        parser.add_argument('owner_after', type=str, location='args',
+        parser.add_argument('public_key', type=str, location='args',
                             required=True)
         args = parser.parse_args()
 
         pool = current_app.config['bigchain_pool']
 
         with pool() as bigchain:
-            unspents = bigchain.get_owned_ids(args['owner_after'])
+            unspents = bigchain.get_owned_ids(args['public_key'])
             # NOTE: We pass '..' as a path to create a valid relative URI
             return [u.to_uri('..') for u in unspents]
 
diff --git a/tests/web/test_unspents.py b/tests/web/test_unspents.py
index 3dc6c487..e5cb3ab1 100644
--- a/tests/web/test_unspents.py
+++ b/tests/web/test_unspents.py
@@ -7,20 +7,20 @@ UNSPENTS_ENDPOINT = '/api/v1/unspents/'
 @pytest.mark.usefixtures('inputs')
 def test_get_unspents_endpoint(b, client, user_pk):
     expected = [u.to_uri('..') for u in b.get_owned_ids(user_pk)]
-    res = client.get(UNSPENTS_ENDPOINT + '?owner_after={}'.format(user_pk))
+    res = client.get(UNSPENTS_ENDPOINT + '?public_key={}'.format(user_pk))
     assert expected == res.json
     assert res.status_code == 200
 
 
 @pytest.mark.usefixtures('inputs')
-def test_get_unspents_endpoint_without_owner_after(client):
+def test_get_unspents_endpoint_without_public_key(client):
     res = client.get(UNSPENTS_ENDPOINT)
     assert res.status_code == 400
 
 
 @pytest.mark.usefixtures('inputs')
-def test_get_unspents_endpoint_with_unused_owner_after(client):
+def test_get_unspents_endpoint_with_unused_public_key(client):
     expected = []
-    res = client.get(UNSPENTS_ENDPOINT + '?owner_after=abc')
+    res = client.get(UNSPENTS_ENDPOINT + '?public_key=abc')
     assert expected == res.json
     assert res.status_code == 200