diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 585888bca2..a4c5a2ca1d 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -1328,6 +1328,21 @@ meta/conf/machine/include/<architecture>/arch-<architecture>.inc
             </glossdef>
         </glossentry>
 
+        <glossentry id='var-BUILD_PREFIX'><glossterm><imagedata fileref="figures/define-generic.png" />BUILD_PREFIX</glossterm>
+            <info>
+                BUILD_PREFIX[doc] = "The toolchain binary prefix used for native recipes."
+            </info>
+            <glossdef>
+                <para>
+                    The toolchain binary prefix used for native recipes.
+                    The OpenEmbedded build system uses the
+                    <filename>BUILD_PREFIX</filename> value to set the
+                    <link linkend='var-TARGET_PREFIX'><filename>TARGET_PREFIX</filename></link>
+                    when building for native recipes.
+                </para>
+            </glossdef>
+        </glossentry>
+
         <glossentry id='var-BUILDDIR'><glossterm><imagedata fileref="figures/define-generic.png" />BUILDDIR</glossterm>
             <info>
                 BUILDDIR[doc] = "Points to the location of the Build Directory."