diff --git a/documentation/dev-manual/dev-manual-start.xml b/documentation/dev-manual/dev-manual-start.xml
index fbebe4d65e..02f6599179 100644
--- a/documentation/dev-manual/dev-manual-start.xml
+++ b/documentation/dev-manual/dev-manual-start.xml
@@ -160,7 +160,8 @@
                 The <filename>poky-extras</filename> Git Repository</emphasis>:
                 The <filename>poky-extras</filename> Git repository contains metadata needed 
                 only if you are modifying and building the kernel image.
-                In particular, it contains the kernel <filename>.bbappend</filename> files that you 
+                In particular, it contains the kernel BitBake append (<filename>.bbappend</filename>)
+                files that you 
                 edit to point to your locally modified kernel source files and to build the kernel
                 image. 
                 Pointing to these local files is much more efficient than requiring a download of the