diff --git a/checkstyle.xml b/checkstyle.xml
index aca85c3f92..0022da12cc 100644
--- a/checkstyle.xml
+++ b/checkstyle.xml
@@ -14,10 +14,10 @@
 
     <!-- See http://checkstyle.sourceforge.net/config_misc.html -->
     <module name="RegexpSingleline">
-       <property name="format" value="\s+$"/>
-       <property name="minimum" value="0"/>
-       <property name="maximum" value="0"/>
-       <property name="message" value="Line has trailing spaces."/>
+        <property name="format" value="\s+$"/>
+        <property name="minimum" value="0"/>
+        <property name="maximum" value="0"/>
+        <property name="message" value="Line has trailing spaces."/>
     </module>
 
     <module name="TreeWalker">