diff --git a/reference/eio/functions/eio-readlink.xml b/reference/eio/functions/eio-readlink.xml
index 1e83fd452f..b9a52f3722 100644
--- a/reference/eio/functions/eio-readlink.xml
+++ b/reference/eio/functions/eio-readlink.xml
@@ -15,7 +15,7 @@
    <methodparam><type>int</type><parameter>pri</parameter></methodparam>
    <methodparam><type>callable</type><parameter>callback</parameter></methodparam>
    <methodparam
-   choice="opt"><type>string</type><parameter>data</parameter><initializer>NULL</initializer></methodparam>
+   choice="opt"><type>mixed</type><parameter>data</parameter><initializer>NULL</initializer></methodparam>
   </methodsynopsis>
   <para>