1 files changed, 6 insertions, 6 deletions
diff --git a/synapse/storage/background_updates.py b/synapse/storage/background_updates.py
index 8af325a9f5..dc9eca7d15 100644
--- a/synapse/storage/background_updates.py
+++ b/synapse/storage/background_updates.py
@@ -12,15 +12,15 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-import synapse.util.async
 
-from ._base import SQLBaseStore
-from . import engines
+import logging
+
+from canonicaljson import json
 
 from twisted.internet import defer
 
-import simplejson as json
-import logging
+from . import engines
+from ._base import SQLBaseStore
 
 logger = logging.getLogger(__name__)
 
@@ -92,7 +92,7 @@ class BackgroundUpdateStore(SQLBaseStore):
         logger.info("Starting background schema updates")
 
         while True:
-            yield synapse.util.async.sleep(
+            yield self.hs.get_clock().sleep(
                 self.BACKGROUND_UPDATE_INTERVAL_MS / 1000.)
 
             try: