diff --git a/manila/api/v2/quota_sets.py b/manila/api/v2/quota_sets.py
index 7db0d5e9a1..5baf5ac91a 100644
--- a/manila/api/v2/quota_sets.py
+++ b/manila/api/v2/quota_sets.py
@@ -139,6 +139,20 @@ class QuotaSetsMixin(object):
 
     @wsgi.Controller.authorize("update")
     def _update(self, req, id, body):
+        body = body.get('quota_set', {})
+        if (body.get('gigabytes') is None and
+                body.get('snapshots') is None and
+                body.get('snapshot_gigabytes') is None and
+                body.get('shares') is None and
+                body.get('share_networks') is None and
+                body.get('share_groups') is None and
+                body.get('share_group_snapshots') is None and
+                body.get('share_replicas') is None and
+                body.get('replica_gigabytes') is None and
+                body.get('per_share_gigabytes') is None):
+            msg = _("Must supply at least one quota field to update.")
+            raise webob.exc.HTTPBadRequest(explanation=msg)
+
         context = req.environ['manila.context']
         project_id = id
         bad_keys = []
@@ -148,7 +162,6 @@ class QuotaSetsMixin(object):
         share_type = params.get('share_type', [None])[0]
         self._validate_user_id_and_share_type_args(user_id, share_type)
         share_type_id = self._get_share_type_id(context, share_type)
-        body = body.get('quota_set', {})
         if share_type and body.get('share_groups',
                                    body.get('share_group_snapshots')):
             msg = _("Share type quotas cannot constrain share groups and "
diff --git a/manila/tests/api/v2/test_quota_sets.py b/manila/tests/api/v2/test_quota_sets.py
index 4526fe6ae9..27318f866f 100644
--- a/manila/tests/api/v2/test_quota_sets.py
+++ b/manila/tests/api/v2/test_quota_sets.py
@@ -771,3 +771,18 @@ class QuotaSetsControllerTest(test.TestCase):
             exception.VersionNotFoundForAPIMethod,
             controller().update,
             req, self.project_id)
+
+    def test_update_without_quota(self):
+        body = {
+            'quota_set': {
+                'tenant_id': self.project_id,
+            }
+        }
+        req = _get_request(True, False)
+
+        self.assertRaises(
+            webob.exc.HTTPBadRequest,
+            self.controller.update,
+            req, self.project_id, body=body)
+        self.mock_policy_check.assert_called_once_with(
+            req.environ['manila.context'], self.resource_name, 'update')
diff --git a/releasenotes/notes/bug-1778975-fix-quota-update-does-not-require-a-value-496ec846d2c43963.yaml b/releasenotes/notes/bug-1778975-fix-quota-update-does-not-require-a-value-496ec846d2c43963.yaml
new file mode 100644
index 0000000000..1cd9bd18f2
--- /dev/null
+++ b/releasenotes/notes/bug-1778975-fix-quota-update-does-not-require-a-value-496ec846d2c43963.yaml
@@ -0,0 +1,5 @@
+---
+fixes:
+  - |
+    Fixed a manila issue while updating quotas. Now manila requires at least
+    a quota value to be updated.