diff --git a/Detector/DetDriftChamber/compact/det.xml b/Detector/DetDriftChamber/compact/det.xml
index be3acc65f86eaa17872f5351617edcce3d4a9405..3920c12a1a7197f21cc46719d1ab68bbf9bc9154 100644
--- a/Detector/DetDriftChamber/compact/det.xml
+++ b/Detector/DetDriftChamber/compact/det.xml
@@ -7,7 +7,7 @@
     url="http://github.com/cepc/CEPCSW"
     status="development"
     version="v0">
-    <comment>Test with Drift Chamber</comment>        
+    <comment>Test with Drift Chamber</comment>
   </info>
 
   <includes>