diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index c1dce009b6..160b068c97 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -8293,6 +8293,27 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-TARGET_CC_KERNEL_ARCH'><glossterm>TARGET_CC_KERNEL_ARCH</glossterm>
+            <glossdef>
+                <para>
+                    This is a specific kernel compiler flag for a CPU or
+                    Application Binary Interface (ABI) tune.
+                    The flag is used rarely and only for cases where a
+                    userspace
+                    <link linkend='var-TUNE_CCARGS'><filename>TUNE_CCARGS</filename></link>
+                    is not compatible with the kernel compilation.
+                    The <filename>TARGET_CC_KERNEL_ARCH</filename> variable
+                    allows the kernel (and associated modules) to use a
+                    different configuration.
+                    See the
+                    <filename>meta/conf/machine/include/arm/feature-arm-thumb.inc</filename>
+                    file in the
+                    <ulink url='&YOCTO_DOCS_DEV_URL;#source-directory'>Source Directory</ulink>
+                    for an example.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-TARGET_CFLAGS'><glossterm>TARGET_CFLAGS</glossterm>
             <glossdef>
                 <para>