diff --git a/synapse/storage/schema/delta/48/group_unique_indexes.py b/synapse/storage/schema/delta/48/group_unique_indexes.py
index b653a987b1..2233af87d7 100644
--- a/synapse/storage/schema/delta/48/group_unique_indexes.py
+++ b/synapse/storage/schema/delta/48/group_unique_indexes.py
@@ -13,6 +13,7 @@
 # limitations under the License.
 
 from synapse.storage.engines import PostgresEngine
+from synapse.storage.prepare_database import get_statements
 
 FIX_INDEXES = """
 -- rebuild indexes as uniques