diff --git a/src/protocols/blur.xml b/src/protocols/blur.xml
index 477bd72afb47e3afdbca8f15c4e737d0dabd0796..fb98fa6b9c0526a393f8829b98a23725e72c321e 100644
--- a/src/protocols/blur.xml
+++ b/src/protocols/blur.xml
@@ -3,6 +3,7 @@
   <copyright><![CDATA[
     SPDX-FileCopyrightText: 2015 Martin Gräßlin
     SPDX-FileCopyrightText: 2015 Marco Martin
+    SPDX-FileCopyrightText: 2022 KylinSoft Co., Ltd.
 
     SPDX-License-Identifier: LGPL-2.1-or-later
   ]]></copyright>
@@ -24,5 +25,8 @@
       <request name="release" type="destructor">
         <description summary="release the blur object"/>
       </request>
+      <request name="set_strength">
+          <arg name="strength" type="uint"/>
+      </request>
   </interface>
 </protocol>