diff --git a/config/checkstyle/checkstyle.xml b/config/checkstyle/checkstyle.xml
index b38c18289..a6650dd65 100644
--- a/config/checkstyle/checkstyle.xml
+++ b/config/checkstyle/checkstyle.xml
@@ -20,7 +20,9 @@
         </module>
         <module name="LocalFinalVariableName" />
         <module name="LocalVariableName" />
-        <module name="MemberName" />
+        <module name="MemberName">
+            <property name="format" value="^[a-z][a-z0-9][a-zA-Z0-9]*$"/>
+        </module>
         <module name="MethodName" />
         <module name="PackageName" />
         <module name="ParameterName" />