diff --git a/docs/libcurl/opts/CURLMOPT_PUSHFUNCTION.3 b/docs/libcurl/opts/CURLMOPT_PUSHFUNCTION.3
index 6a360e793380caa0e3a9529aa176eedf762c83b4..9c579615e24d781edb3169f1ee9f64af23225f28 100644
--- a/docs/libcurl/opts/CURLMOPT_PUSHFUNCTION.3
+++ b/docs/libcurl/opts/CURLMOPT_PUSHFUNCTION.3
@@ -77,7 +77,8 @@ Returns the header at index 'num' (or NULL). The returned pointer points to a
 Returns the value for the given header name (or NULL). This is a shortcut so
 that the application doesn't have to loop through all headers to find the one
 it is interested in. The data pointed will be freed when this callback
-returns.
+returns. If more than one header field use the same name, this returns only
+the first one.
 .SH CALLBACK RETURN VALUE
 .IP "CURL_PUSH_OK (0)"
 The application has accepted the stream and it can now start receiving data,