diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..a5c2315
Binary files /dev/null and b/.DS_Store differ
diff --git a/octodns/manager.py b/octodns/manager.py
index 0e76132..f52457d 100644
--- a/octodns/manager.py
+++ b/octodns/manager.py
@@ -600,7 +600,12 @@ class Manager(object):
         aliased_zones = {}
         delayed_arpa = []
         futures = []
+
         for zone_name, config in zones.items():
+            if config is None:
+                raise ManagerException(
+                    f'Passed zone: {zone_name} not found in config'
+                )
             decoded_zone_name = idna_decode(zone_name)
             self.log.info('sync:   zone=%s', decoded_zone_name)
             if 'alias' in config:
diff --git a/tests/config/missing-zone-config.yaml b/tests/config/missing-zone-config.yaml
new file mode 100644
index 0000000..8b509cc
--- /dev/null
+++ b/tests/config/missing-zone-config.yaml
@@ -0,0 +1,10 @@
+manager:
+  max_workers: 2
+providers:
+  in:
+    class: octodns.provider.yaml.YamlProvider
+    directory: tests/config
+  dump:
+    class: octodns.provider.yaml.YamlProvider
+    directory: env/YAML_TMP_DIR
+zones: {}
\ No newline at end of file
diff --git a/tests/test_octodns_manager.py b/tests/test_octodns_manager.py
index 79f4318..7db4fde 100644
--- a/tests/test_octodns_manager.py
+++ b/tests/test_octodns_manager.py
@@ -79,6 +79,11 @@ class TestManager(TestCase):
             )
         self.assertTrue('missing sources' in str(ctx.exception))
 
+    def test_missing_zone(self):
+        with self.assertRaises(ManagerException) as ctx:
+            Manager(get_config_filename('missing-zone-config.yaml')).sync()
+        self.assertTrue('Passed zone:' in str(ctx.exception))
+
     def test_missing_targets(self):
         with self.assertRaises(ManagerException) as ctx:
             Manager(get_config_filename('provider-problems.yaml')).sync(