diff --git a/lib/fluent/plugin/in_tail.rb b/lib/fluent/plugin/in_tail.rb
index f3dcff4cf1..63ec165b96 100644
--- a/lib/fluent/plugin/in_tail.rb
+++ b/lib/fluent/plugin/in_tail.rb
@@ -64,8 +64,8 @@ def initialize
     config_param :path, :string
     desc 'path delimiter used for spliting path config'
     config_param :path_delimiter, :string, default: ','
-    desc 'Choose using glob patterns. Adding whether a capability to handle [] and ? or not.'
-    config_param :glob_policy, :enum, list: [:backward_compatible, :extended], default: :backward_compatible
+    desc 'Choose using glob patterns. Adding capabilities to handle [] and ?, and {}.'
+    config_param :glob_policy, :enum, list: [:backward_compatible, :extended, :always], default: :backward_compatible
     desc 'The tag of the event.'
     config_param :tag, :string
     desc 'The paths to exclude the files from watcher list.'
@@ -142,6 +142,10 @@ def configure(conf)
         raise Fluent::ConfigError, "either of enable_watch_timer or enable_stat_watcher must be true"
       end
 
+      if @glob_policy == :always && @path_delimiter == ','
+        raise Fluent::ConfigError, "cannot use glob_policy as always with the default path_delimitor: `,\""
+      end
+
       if RESERVED_CHARS.include?(@path_delimiter)
         rc = RESERVED_CHARS.join(', ')
         raise Fluent::ConfigError, "#{rc} are reserved words: #{@path_delimiter}"
@@ -288,7 +292,9 @@ def have_read_capability?
     # Curly braces is not supported for now because the default delimiter of path is ",".
     # This should be collided for wildcard pattern for curly braces.
     def use_glob?(path)
-      if @glob_policy == :extended
+      if @glob_policy == :always
+        path.include?('*') || path.include?('?') || /\[.*\]/.match(path) || /\{.*,.*\}/.match(path)
+      elsif @glob_policy == :extended
         path.include?('*') || path.include?('?') || /\[.*\]/.match(path)
       elsif @glob_policy == :backward_compatible
         path.include?('*')
diff --git a/test/plugin/test_in_tail.rb b/test/plugin/test_in_tail.rb
index 3e612ce55d..296386ffc6 100644
--- a/test/plugin/test_in_tail.rb
+++ b/test/plugin/test_in_tail.rb
@@ -1600,6 +1600,43 @@ def ex_config_with_brackets
                    })
     end
 
+    def test_config_with_always_with_default_delimiter
+      assert_raise(Fluent::ConfigError) do
+        config = config_element("", "", {
+                         "tag" => "tail",
+                         "path" => "test/plugin/data/log_numeric/[0-1][2-4].log",
+                         "format" => "none",
+                         "pos_file" => "#{@tmp_dir}/tail.pos",
+                         "read_from_head" => true,
+                         "refresh_interval" => 30,
+                         "glob_policy" => "always",
+                         "rotate_wait" => "#{EX_ROTATE_WAIT}s",
+                         "follow_inodes" => "#{EX_FOLLOW_INODES}",
+                       })
+
+        create_driver(config, false).instance
+      end
+    end
+
+    def test_config_with_always_with_custom_delimiter
+      assert_nothing_raised do
+        config = config_element("", "", {
+                         "tag" => "tail",
+                         "path" => "test/plugin/data/log_numeric/[0-1][2-4].log",
+                         "format" => "none",
+                         "pos_file" => "#{@tmp_dir}/tail.pos",
+                         "read_from_head" => true,
+                         "refresh_interval" => 30,
+                         "glob_policy" => "always",
+                         "path_delimiter" => "|",
+                         "rotate_wait" => "#{EX_ROTATE_WAIT}s",
+                         "follow_inodes" => "#{EX_FOLLOW_INODES}",
+                       })
+
+        create_driver(config, false).instance
+      end
+    end
+
     def test_expand_paths_with_brackets
       expanded_paths = [
         create_target_info('test/plugin/data/log_numeric/01.log'),