diff --git a/src/core/gcal-timeline.c b/src/core/gcal-timeline.c
index 4a757af30382121a6f1522b7f2963b6c1f37a23f..e26f6722e19b473864645e387cb9a9093946db58 100644
--- a/src/core/gcal-timeline.c
+++ b/src/core/gcal-timeline.c
@@ -587,8 +587,6 @@ on_calendar_monitor_completed_cb (GcalCalendarMonitor *monitor,
 
   if (gcal_calendar_monitor_is_complete (monitor))
     self->completed_calendars++;
-  else
-    self->completed_calendars--;
 
   g_assert (self->completed_calendars <= g_hash_table_size (self->calendars));