diff --git a/reference/funchand/functions/call-user-func-array.xml b/reference/funchand/functions/call-user-func-array.xml
index e5f7d5e38e..52657c3084 100644
--- a/reference/funchand/functions/call-user-func-array.xml
+++ b/reference/funchand/functions/call-user-func-array.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.17 $ -->
+<!-- $Revision: 1.18 $ -->
 <refentry xml:id="function.call-user-func-array" xmlns="http://docbook.org/ns/docbook">
  <refnamediv>
   <refname>call_user_func_array</refname>
@@ -82,6 +82,18 @@ call_user_func_array('debug', array("_POST", $_POST));
   </para>
  </refsect1>
 
+ <refsect1 role="notes">
+  &reftitle.notes;
+  <note>
+   <para>
+    Referenced variables in <parameter>param_arr</parameter> are passed to the
+    function by a reference, others are passed by a value. In other words, it
+    does not depend on the function signature whether the parameter is passed
+    by a value or by a reference.
+   </para>
+  </note>
+ </refsect1>
+
  <refsect1 role="seealso">
   &reftitle.seealso;
   <para>