diff --git a/bindings/xml/comment-xml-schema.rng b/bindings/xml/comment-xml-schema.rng
index 1438e3c35174e427d22946ffad43e6c4fb647698..8302d9d369149d4ad5f34eee0df3c6a0a7b7a917 100644
--- a/bindings/xml/comment-xml-schema.rng
+++ b/bindings/xml/comment-xml-schema.rng
@@ -288,7 +288,7 @@
   </define>
 
   <define name="Attribute">
-   <element name="Availability">
+    <element name="Availability">
       <attribute name="distribution">
           <data type="string" />
       </attribute>
@@ -317,7 +317,7 @@
           <data type="boolean" />
         </element>
       </optional>
-   </element>
+    </element>
   </define>
 
   <define name="Abstract">