diff --git a/en-US/dita/RTC-NG/API/api_irtcengine_setlocalvideodatasourceposition.dita b/en-US/dita/RTC-NG/API/api_irtcengine_setlocalvideodatasourceposition.dita
index fc03a624f7f..77481e90df3 100644
--- a/en-US/dita/RTC-NG/API/api_irtcengine_setlocalvideodatasourceposition.dita
+++ b/en-US/dita/RTC-NG/API/api_irtcengine_setlocalvideodatasourceposition.dita
@@ -2,7 +2,7 @@
 <!DOCTYPE reference PUBLIC "-//OASIS//DTD DITA Reference//EN" "reference.dtd">
 <reference id="api_irtcengine_setlocalvideodatasourceposition">
     <title><ph keyref="setLocalVideoDataSourcePosition"/></title>
-    <shortdesc id="short"><ph id="shortdesc">Set the observation position of the local video frame.</ph></shortdesc>
+    <shortdesc id="short"><ph id="shortdesc">Sets the observation position of the local video frame.</ph></shortdesc>
     <prolog>
         <metadata>
             <keywords>