diff --git a/synapse/storage/schema/delta/56/stats_separated1.sql b/synapse/storage/schema/delta/56/stats_separated1.sql
index d987479363..eb85e1591d 100644
--- a/synapse/storage/schema/delta/56/stats_separated1.sql
+++ b/synapse/storage/schema/delta/56/stats_separated1.sql
@@ -67,7 +67,7 @@ INSERT INTO stats_incremental_position (
 CREATE TABLE IF NOT EXISTS room_stats_current (
     room_id TEXT NOT NULL PRIMARY KEY,
 
-    -- These starts cover the time from start_ts…end_ts (in seconds).
+    -- These starts cover the time from start_ts...end_ts (in seconds).
     -- Note that end_ts is quantised, and start_ts usually so.
     start_ts BIGINT,
     end_ts BIGINT,
@@ -91,7 +91,7 @@ CREATE TABLE IF NOT EXISTS room_stats_current (
 -- represents HISTORICAL room statistics for a room
 CREATE TABLE IF NOT EXISTS room_stats_historical (
     room_id TEXT NOT NULL,
-    -- These starts cover the time from (end_ts - bucket_size)…end_ts (in seconds).
+    -- These stats cover the time from (end_ts - bucket_size)...end_ts (in seconds).
     -- Note that end_ts is quantised, and start_ts usually so.
     end_ts BIGINT NOT NULL,
     bucket_size INT NOT NULL,
diff --git a/synapse/storage/schema/delta/56/stats_separated2.py b/synapse/storage/schema/delta/56/stats_separated2.py
index c5e3208adb..049867fa3e 100644
--- a/synapse/storage/schema/delta/56/stats_separated2.py
+++ b/synapse/storage/schema/delta/56/stats_separated2.py
@@ -22,7 +22,7 @@ def _run_create_generic(stats_type, cursor, database_engine):
     """
     Creates the pertinent (partial, if supported) indices for one kind of stats.
     Args:
-        stats_type: "room" or "user" – the type of stats
+        stats_type: "room" or "user" - the type of stats
         cursor: Database Cursor
         database_engine: Database Engine
     """
@@ -72,7 +72,7 @@ def _run_create_generic(stats_type, cursor, database_engine):
 def run_create(cursor, database_engine):
     """
     This function is called as part of the schema delta.
-    It will create indices – partial, if supported – for the new 'separated'
+    It will create indices - partial, if supported - for the new 'separated'
     room & user statistics.
     """
     _run_create_generic("room", cursor, database_engine)