diff --git a/src/Monitoring/ThreadWatcher.coffee b/src/Monitoring/ThreadWatcher.coffee
index 2cb7bf6fd..e6a3e2bcd 100644
--- a/src/Monitoring/ThreadWatcher.coffee
+++ b/src/Monitoring/ThreadWatcher.coffee
@@ -127,6 +127,7 @@ ThreadWatcher =
         $.open a.href
       $.event 'CloseMenu'
     clear: ->
+      return unless confirm "Delete ALL threads from watcher?"
       for {siteID, boardID, threadID} in ThreadWatcher.getAll()
         ThreadWatcher.db.delete {siteID, boardID, threadID}
       ThreadWatcher.refresh()