diff --git a/documentation/ref-manual/ref-classes.xml b/documentation/ref-manual/ref-classes.xml
index ce8f6a6ba2..66e4a05509 100644
--- a/documentation/ref-manual/ref-classes.xml
+++ b/documentation/ref-manual/ref-classes.xml
@@ -261,7 +261,7 @@
 
     <para>
         The boot image (<filename>bootimg</filename> class creates a bootable
-        image using SYSLINUX, your kernel and an optional initial ram disk
+        image using SYSLINUX, your kernel and an optional initial RAM disk
         (<filename>initrd</filename>).
     </para>