diff --git a/documentation/ref-manual/classes.rst b/documentation/ref-manual/classes.rst
index 5aaf8ecc0c..412dc5ca2f 100644
--- a/documentation/ref-manual/classes.rst
+++ b/documentation/ref-manual/classes.rst
@@ -1184,13 +1184,17 @@ enables the :ref:`ref-classes-image_types` class. The :ref:`ref-classes-image` c
 ``IMGCLASSES`` variable as follows::
 
    IMGCLASSES = "rootfs_${IMAGE_PKGTYPE} image_types ${IMAGE_CLASSES}"
-   IMGCLASSES += "${@['populate_sdk_base', 'populate_sdk_ext']['linux' in d.getVar("SDK_OS")]}"
+   # Only Linux SDKs support populate_sdk_ext, fall back to populate_sdk_base
+   # in the non-Linux SDK_OS case, such as mingw32
+   inherit populate_sdk_base
+   IMGCLASSES += "${@['', 'populate_sdk_ext']['linux' in d.getVar("SDK_OS")]}"
    IMGCLASSES += "${@bb.utils.contains_any('IMAGE_FSTYPES', 'live iso hddimg', 'image-live', '', d)}"
    IMGCLASSES += "${@bb.utils.contains('IMAGE_FSTYPES', 'container', 'image-container', '', d)}"
    IMGCLASSES += "image_types_wic"
    IMGCLASSES += "rootfs-postcommands"
    IMGCLASSES += "image-postinst-intercepts"
-   inherit ${IMGCLASSES}
+   IMGCLASSES += "overlayfs-etc"
+   inherit_defer ${IMGCLASSES}
 
 The :ref:`ref-classes-image_types` class also handles conversion and compression of images.