diff --git a/tabellio/pcfdb/sync.py b/tabellio/pcfdb/sync.py
index 5a3a606..b05b27d 100644
--- a/tabellio/pcfdb/sync.py
+++ b/tabellio/pcfdb/sync.py
@@ -951,9 +951,10 @@ class SyncFromPcfDbView(BrowserView):
 
         where_ts = ''
         if timestamp:
-            where_ts = cursor.mogrify('''AND EXISTS (SELECT ts FROM t_histoline
+            where_ts = cursor.mogrify('''AND (EXISTS (SELECT ts FROM t_histoline
                                                        WHERE idhisto = t_histo.id
-                                                         AND ts > %s)''', (timestamp,))
+                                                         AND ts > %s)
+                                              OR t_histo.ts > %s)''', (timestamp, timestamp))
 
         ### Handle t_dossiers
         cursor.execute('''SELECT t_histo.id, t_histo.st, t_histo.type,
@@ -1023,9 +1024,10 @@ class SyncFromPcfDbView(BrowserView):
         ### Handle t_qx
         where_ts = ''
         if timestamp:
-            where_ts = cursor.mogrify('''AND EXISTS (SELECT ts FROM t_histoline
+            where_ts = cursor.mogrify('''AND (EXISTS (SELECT ts FROM t_histoline
                                                        WHERE idhisto = t_histo.id
-                                                         AND ts > %s)''', (timestamp,))
+                                                         AND ts > %s)
+                                              OR t_histo.ts > %s)''', (timestamp, timestamp))
 
         cursor.execute('''SELECT t_histo.id, t_histo.st, t_histo.type, t_histo.sess,
                                  t_histo.no, t_histo.intit, t_histo.auteurs,