diff --git a/reference/curl/functions/curl-setopt.xml b/reference/curl/functions/curl-setopt.xml
index 6974baa8cf..b8c187a699 100644
--- a/reference/curl/functions/curl-setopt.xml
+++ b/reference/curl/functions/curl-setopt.xml
@@ -1264,9 +1264,8 @@
        </informaltable>
       </para>
       <para>
-       <parameter>value</parameter> should be a string that is the name of a valid
-       callback function for the following values of the
-       <parameter>option</parameter> parameter:
+       <parameter>value</parameter> should be the name of a valid function or a Closure 
+       for the following values of the <parameter>option</parameter> parameter:
        <informaltable>
         <tgroup cols="3">
          <thead>
@@ -1279,18 +1278,18 @@
           <row>
            <entry valign="top"><constant>CURLOPT_HEADERFUNCTION</constant></entry>
            <entry valign="top">
-            The name of a callback function where the callback function takes
-            two parameters. The first is the cURL resource, the second is a
+            A callback accepting two parameters.
+            The first is the cURL resource, the second is a
             string with the header data to be written. The header data must
-            be written when using this callback function. Return the number of 
+            be written when by this callback. Return the number of 
             bytes written.
            </entry>
           </row>
           <row>
            <entry valign="top"><constant>CURLOPT_PASSWDFUNCTION</constant></entry>
            <entry valign="top">
-            The name of a callback function where the callback function takes
-            three parameters. The first is the cURL resource, the second is a
+            A callback accepting three parameters. 
+            The first is the cURL resource, the second is a
             string containing a password prompt, and the third is the maximum
             password length. Return the string containing the password.
            </entry>
@@ -1298,8 +1297,8 @@
           <row>
            <entry valign="top"><constant>CURLOPT_PROGRESSFUNCTION</constant></entry>
            <entry valign="top">
-            The name of a callback function where the callback function takes
-            three parameters. The first is the cURL resource, the second is a
+            A callback accepting three parameters. 
+            The first is the cURL resource, the second is a
             file-descriptor resource, and the third is length. Return the
             string containing the data.
            </entry>
@@ -1307,11 +1306,11 @@
           <row>
            <entry valign="top"><constant>CURLOPT_READFUNCTION</constant></entry>
            <entry valign="top">
-            The name of a callback function where the callback function takes
-            three parameters. The first is the cURL resource, the second is a
+            A callback accepting three parameters. 
+            The first is the cURL resource, the second is a
             stream resource provided to cURL through the option
             <constant>CURLOPT_INFILE</constant>, and the third is the maximum
-            amount of data to be read. The callback function must return a string
+            amount of data to be read. The callback must return a string
             with a length equal or smaller than the amount of data requested,
             typically by reading it from the passed stream resource. It should
             return an empty string to signal <literal>EOF</literal>.
@@ -1320,10 +1319,10 @@
           <row>
            <entry valign="top"><constant>CURLOPT_WRITEFUNCTION</constant></entry>
            <entry valign="top">
-            The name of a callback function where the callback function takes
-            two parameters. The first is the cURL resource, and the second is a
-            string with the data to be written. The data must be saved by using
-            this callback function. It must return the exact number of bytes written 
+            A callback accepting two parameters. 
+            The first is the cURL resource, and the second is a
+            string with the data to be written. The data must be saved by
+            this callback. It must return the exact number of bytes written 
             or the transfer will be aborted with an error.
            </entry>
           </row>