diff --git a/tabellio/pcfdb/sync.py b/tabellio/pcfdb/sync.py
index 0018560..20b7d7e 100644
--- a/tabellio/pcfdb/sync.py
+++ b/tabellio/pcfdb/sync.py
@@ -434,8 +434,8 @@ class SyncFromPcfDbView(BrowserView):
         cursor = self.db_connection.cursor()
         where_ts = ''
         if timestamp:
-            where_ts = cursor.mogrify('AND (t_pershistoline.ts > %s
-                                            OR t_pers.ts > %s)', (timestamp, timestamp))
+            where_ts = cursor.mogrify('''AND (t_pershistoline.ts > %s
+                                              OR t_pers.ts > %s)''', (timestamp, timestamp))
 
         # previous deputies
         cursor.execute('''SELECT t_pers.id, t_pers.nom, prenom, sexe, datenaiss,