diff --git a/lib/fluent/command/fluentd.rb b/lib/fluent/command/fluentd.rb
index d8707b7bcd..4cda843746 100644
--- a/lib/fluent/command/fluentd.rb
+++ b/lib/fluent/command/fluentd.rb
@@ -256,7 +256,7 @@
       description: FLUENTD_WINSVC_DESC,
       start_type: start_type,
       error_control: Service::ERROR_NORMAL,
-      binary_path_name: ruby_path+" -C "+binary_path+" winsvc.rb",
+      binary_path_name: "\"#{ruby_path}\" -C \"#{binary_path}\"  winsvc.rb",
       load_order_group: "",
       dependencies: [""],
       display_name: FLUENTD_WINSVC_DISPLAYNAME
diff --git a/lib/fluent/winsvc.rb b/lib/fluent/winsvc.rb
index 97eaf34f2f..ecb0ff9451 100644
--- a/lib/fluent/winsvc.rb
+++ b/lib/fluent/winsvc.rb
@@ -40,7 +40,7 @@ def service_main_start
     ruby_path = ruby_path.rstrip.gsub(/\\/, '/')
     rubybin_dir = ruby_path[0, ruby_path.rindex("/")]
     opt = read_fluentdopt
-    Process.spawn(rubybin_dir + "/ruby.exe " + rubybin_dir + "/fluentd " + opt + " -x " + INTEVENTOBJ_NAME)
+    Process.spawn("\"#{rubybin_dir}/ruby.exe\" \"#{rubybin_dir}/fluentd\" #{opt} -x #{INTEVENTOBJ_NAME}")
   end
 
   class FluentdService < Daemon