diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 3169573095..17bf1e49b9 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -15416,7 +15416,7 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     a value where underscores are not allowed, for example
                     within package filenames.
                     In this case, dash characters replace any underscore
-                    characters used in TARGET_ARCH.
+                    characters used in <filename>TARGET_ARCH</filename>.
                 </para>
 
                 <para>