diff --git a/reference/curl/functions/curl-setopt.xml b/reference/curl/functions/curl-setopt.xml
index e0a4d5e25f..e471e7694e 100644
--- a/reference/curl/functions/curl-setopt.xml
+++ b/reference/curl/functions/curl-setopt.xml
@@ -1062,7 +1062,10 @@
           <row>
            <entry valign="top"><constant>CURLOPT_HTTPHEADER</constant></entry>
            <entry valign="top">
-            An array of HTTP header fields to set.
+            An array of HTTP header fields to set, in the format
+            <code>
+             array('Content-type: text/plain', 'Content-length: 100')
+            </code>
            </entry>
            <entry valign="top">
            </entry>