diff --git a/documentation/ref-manual/ref-structure.xml b/documentation/ref-manual/ref-structure.xml
index 5535d58406..d4a42f994a 100644
--- a/documentation/ref-manual/ref-structure.xml
+++ b/documentation/ref-manual/ref-structure.xml
@@ -586,7 +586,7 @@
 
         <para>
             This directory contains all the machine configuration files.
-            If you set <filename>MACHINE="qemux86"</filename>,
+            If you set <filename>MACHINE = "qemux86"</filename>,
             the OpenEmbedded build system looks for a <filename>qemux86.conf</filename> file in this
             directory.
             The <filename>include</filename> directory contains various data common to multiple machines.