diff --git a/documentation/ref-manual/ref-variables.xml b/documentation/ref-manual/ref-variables.xml
index 214ef09f4a..179fbd4575 100644
--- a/documentation/ref-manual/ref-variables.xml
+++ b/documentation/ref-manual/ref-variables.xml
@@ -7812,6 +7812,16 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     <link linkend='var-CFLAGS'><filename>CFLAGS</filename></link>
                     is set to the value of this variable by default.
                 </para>
+
+                <para>
+                    Additionally, the SDK's environment setup script sets
+                    the
+                    <link linkend='var-CFLAGS'><filename>CFLAGS</filename></link>
+                    variable in the environment to the
+                    <filename>TARGET_CFLAGS</filename> value so that
+                    executables built using the SDK also have the flags
+                    applied.
+                </para>
             </glossdef>
         </glossentry>
 
@@ -7825,6 +7835,16 @@ recipes-graphics/xorg-font/font-alias_1.0.3.bb:PR = "${INC_PR}.3"
                     <link linkend='var-CPPFLAGS'><filename>CPPFLAGS</filename></link>
                     is set to the value of this variable by default.
                 </para>
+
+                <para>
+                    Additionally, the SDK's environment setup script sets
+                    the
+                    <link linkend='var-CPPFLAGS'><filename>CPPFLAGS</filename></link>
+                    variable in the environment to the
+                    <filename>TARGET_CPPFLAGS</filename> value so that
+                    executables built using the SDK also have the flags
+                    applied.
+                </para>
             </glossdef>
         </glossentry>