diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 8c3bbaa569..7025041f23 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1979,6 +1979,20 @@ Core layer for images cannot be removed
+ IMAGE_POSTPROCESS_COMMAND
+
+
+ Added by classes to run post processing commands once the
+ OpenEmbedded build system has created the image.
+ You can specify shell commands and, if necessary, the path
+ to the root filesystem image:
+
+ ROOTFS_POSTPROCESS_COMMAND += "${IMAGE_ROOTFS}<shell_command>; ... "
+
+
+
+
+
IMAGE_ROOTFS