diff --git a/irc/client.go b/irc/client.go
index e5c04463..059cbcbe 100644
--- a/irc/client.go
+++ b/irc/client.go
@@ -165,6 +165,10 @@ func (client *Client) IdleTime() time.Duration {
 	return time.Since(client.atime)
 }
 
+func (client *Client) SignonTime() int64 {
+	return client.ctime.Unix()
+}
+
 func (client *Client) IdleSeconds() uint64 {
 	return uint64(client.IdleTime().Seconds())
 }
diff --git a/irc/reply.go b/irc/reply.go
index 1ce42521..2a98a65e 100644
--- a/irc/reply.go
+++ b/irc/reply.go
@@ -258,7 +258,8 @@ func RplWhoisOperator(client *Client) Reply {
 
 func RplWhoisIdle(client *Client) Reply {
 	return NewNumericReply(client.server, RPL_WHOISIDLE,
-		"%s %d :seconds idle", client.Nick(), client.IdleSeconds())
+		"%s %d %d :seconds idle, signon time",
+		client.Nick(), client.IdleSeconds(), client.SignonTime())
 }
 
 // TODO check message length