diff --git a/lib/fluent/plugin/in_tail.rb b/lib/fluent/plugin/in_tail.rb
index fb29dd249f..ef2f6b6c77 100644
--- a/lib/fluent/plugin/in_tail.rb
+++ b/lib/fluent/plugin/in_tail.rb
@@ -778,7 +778,7 @@ def initialize(target_info, pe, log, read_from_head, follow_inodes, update_watch
       attr_accessor :group_watcher
 
       def tag
-        @parsed_tag ||= @path.tr('/', '.').gsub(/\.+/, '.').gsub(/^\./, '')
+        @parsed_tag ||= @path.tr('/', '.').squeeze('.').gsub(/^\./, '')
       end
 
       def register_watcher(watcher)