diff --git a/libsofia-sip-ua/docs/conformance.docs b/libsofia-sip-ua/docs/conformance.docs
index 5706cdca0793875855d3976400f6daed2ce12ce1..7b92841ef054757336e980e45514d14363b4ca4f 100644
--- a/libsofia-sip-ua/docs/conformance.docs
+++ b/libsofia-sip-ua/docs/conformance.docs
@@ -963,6 +963,23 @@ below.
     </td>
 </tr>
 
+<a name="5057"></a>
+<tr valign=top>
+    <th align="left">
+	@RFC5057: Multiple Dialog Usages in SIP
+    </th>
+    <td>
+	Sofia-SIP provides function sip_response_terminates_dialog() that
+	can be used to determine the effect of error response with dialog.
+	
+	The nua UA engine uses sip_response_terminates_dialog().
+    </td>
+    <td>
+        The client application must either use NUA or
+        sip_response_terminates_dialog().
+    </td>
+</tr>
+
 </table>
 
 <table border=1 cellpadding=4 cellspacing=0>