diff --git a/manual/appendix/config_file_options.tex b/manual/appendix/config_file_options.tex
index 287495ae5c..c298bf0509 100644
--- a/manual/appendix/config_file_options.tex
+++ b/manual/appendix/config_file_options.tex
@@ -88,6 +88,9 @@
     \opt{HAVE_CAR_ADAPTER_MODE}{
       car adapter mode & on, off & N/A\\
     }
+    \opt{accessory_supply}{
+      accessory power supply & on, off & N/A\\
+    }
     idle poweroff   & off, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 30, 45, 60
                                         & minutes\\
     max files in playlist & 1000 - 32000 & N/A\\
diff --git a/manual/configure_rockbox/system_options.tex b/manual/configure_rockbox/system_options.tex
index a6c62021a8..ae2fe0f543 100644
--- a/manual/configure_rockbox/system_options.tex
+++ b/manual/configure_rockbox/system_options.tex
@@ -150,6 +150,16 @@ This sub menu relates to limits in the Rockbox operating system.
   playback.
 }
 
+\opt{accessory_supply}{
+\subsection{Accessory Power Supply}
+This option turns the accessory power supply \setting{On} and \setting{Off}.
+The Apple accessory protocol has been partially implemented in Rockbox, and
+thus there is a reasonable chance that your favourite accessory will work.
+The accessory may require power from the \dap{} to function, and if so you should turn
+this option \setting{On}. If it is not required, then turning this setting
+\setting{Off} will save battery and therefore result in better runtime.
+} 
+
 \opt{HAVE_BUTTON_LIGHTS}{
   \opt{e200}{
   \subsection{Wheel Light Timeout}