diff --git a/documentation/dev-manual/dev-manual-common-tasks.xml b/documentation/dev-manual/dev-manual-common-tasks.xml
index 0476c5a5f1..fb2731931d 100644
--- a/documentation/dev-manual/dev-manual-common-tasks.xml
+++ b/documentation/dev-manual/dev-manual-common-tasks.xml
@@ -9896,7 +9896,7 @@
                     Alternatively, you can add "tools-debug" to
                     <ulink url='&YOCTO_DOCS_REF_URL;#var-IMAGE_FEATURES'><filename>IMAGE_FEATURES</filename></ulink>:
                     <literallayout class='monospaced'>
-     IMAGE_FEATURES = " tools-debug"
+     IMAGE_FEATURES_append = " tools-debug"
                     </literallayout>
                     </para></listitem>
                 <listitem><para>
@@ -9909,7 +9909,7 @@
                     Alternatively, you can do the following to include all the
                     debug symbols:
                     <literallayout class='monospaced'>
-     IMAGE_FEATURES = " dbg-pkgs"
+     IMAGE_FEATURES_append = " dbg-pkgs"
                     </literallayout>
                     </para></listitem>
             </itemizedlist>