diff --git a/epan/dissectors/packet-rtcp.c b/epan/dissectors/packet-rtcp.c
index 04dfa2eab9..303911fc4e 100644
--- a/epan/dissectors/packet-rtcp.c
+++ b/epan/dissectors/packet-rtcp.c
@@ -934,14 +934,14 @@ void srtcp_add_address( packet_info *pinfo,
      * Check if the ip address and port combination is not
      * already registered as a conversation.
      */
-    p_conv = find_conversation( pinfo->num, addr, &null_addr, CONVERSATION_UDP, port, other_port,
+    p_conv = find_conversation( setup_frame_number, addr, &null_addr, CONVERSATION_UDP, port, other_port,
                                 NO_ADDR_B | (!other_port ? NO_PORT_B : 0));
 
     /*
      * If not, create a new conversation.
      */
     if ( ! p_conv ) {
-        p_conv = conversation_new( pinfo->num, addr, &null_addr, CONVERSATION_UDP,
+        p_conv = conversation_new( setup_frame_number, addr, &null_addr, CONVERSATION_UDP,
                                    (guint32)port, (guint32)other_port,
                                    NO_ADDR2 | (!other_port ? NO_PORT2 : 0));
     }