1 files changed, 4 insertions, 3 deletions
diff --git a/synapse/handlers/read_marker.py b/synapse/handlers/read_marker.py
index 5142ae153d..32108568c6 100644
--- a/synapse/handlers/read_marker.py
+++ b/synapse/handlers/read_marker.py
@@ -13,13 +13,14 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-from ._base import BaseHandler
+import logging
 
 from twisted.internet import defer
 
-from synapse.util.async import Linearizer
+from synapse.util.async_helpers import Linearizer
+
+from ._base import BaseHandler
 
-import logging
 logger = logging.getLogger(__name__)