diff --git a/appendices/ini.core.xml b/appendices/ini.core.xml
index 75e103e802..bf3805395a 100644
--- a/appendices/ini.core.xml
+++ b/appendices/ini.core.xml
@@ -477,6 +477,11 @@
         directive appears at the top of the script. When ISO-8859-1 incompatible encoding
         is used, both zend.multibyte and zend.script_encoding must be used.
        </para>
+       <para>
+        Literal strings will be transliterated from zend.script_enconding to
+        mbstring.internal_encoding, as if
+        <function>mb_convert_encoding</function> would have been called.
+       </para>
       </listitem>
      </varlistentry>