diff --git a/documentation/sdk-manual/sdk-extensible.xml b/documentation/sdk-manual/sdk-extensible.xml
index 4210d15333..be80621b07 100644
--- a/documentation/sdk-manual/sdk-extensible.xml
+++ b/documentation/sdk-manual/sdk-extensible.xml
@@ -997,7 +997,7 @@
         with the <filename>inherit</filename> directive, leaving the recipe
         to describe just the things that are specific to the software to be
         built.
-        A <ulink url='ref-classes-base'><filename>base</filename></ulink>
+        A <ulink url='&YOCTO_DOCS_REF_URL;#ref-classes-base'><filename>base</filename></ulink>
         class exists that is implicitly inherited by all recipes and provides
         the functionality that most typical recipes need.
     </para>