diff --git a/documentation/ref-manual/variables.rst b/documentation/ref-manual/variables.rst
index 3002bda3ff..82cef4511c 100644
--- a/documentation/ref-manual/variables.rst
+++ b/documentation/ref-manual/variables.rst
@@ -7422,13 +7422,16 @@ system and gives an overview of their function and contents.
       :term:`SDK_EXT_TYPE` is set to "full".
 
    :term:`SDK_NAME`
-      The base name for SDK output files. The name is derived from the
-      :term:`DISTRO`, :term:`TCLIBC`,
-      :term:`SDK_ARCH`,
-      :term:`IMAGE_BASENAME`, and
-      :term:`TUNE_PKGARCH` variables::
+      The base name for SDK output files. The default value (as set in
+      ``meta-poky/conf/distro/poky.conf``) is derived from the
+      :term:`DISTRO`,
+      :term:`TCLIBC`,
+      :term:`SDKMACHINE`,
+      :term:`IMAGE_BASENAME`,
+      :term:`TUNE_PKGARCH`, and
+      :term:`MACHINE` variables::
 
-         SDK_NAME = "${DISTRO}-${TCLIBC}-${SDK_ARCH}-${IMAGE_BASENAME}-${TUNE_PKGARCH}"
+         SDK_NAME = "${DISTRO}-${TCLIBC}-${SDKMACHINE}-${IMAGE_BASENAME}-${TUNE_PKGARCH}-${MACHINE}"
 
    :term:`SDK_OS`
       Specifies the operating system for which the SDK will be built. The