diff --git a/language/control-structures/include-once.xml b/language/control-structures/include-once.xml
index b6fe04cde4..0218d494b7 100644
--- a/language/control-structures/include-once.xml
+++ b/language/control-structures/include-once.xml
@@ -9,8 +9,8 @@
   the specified file during the execution of the script.
   This is a behavior similar to the <function>include</function> statement,
   with the only difference being that if the code from a file has already
-  been included, it will not be included again.  As the name suggests,
-  it will be included just once.
+  been included, it will not be included again, and include_once returns &true;.  As the name suggests,
+  the file will be included just once.
  </para>
  <para>
   <literal>include_once</literal> may be used in cases where