diff --git a/discord/time.go b/discord/time.go
index febef55..01d205d 100644
--- a/discord/time.go
+++ b/discord/time.go
@@ -76,6 +76,10 @@ func (t UnixTimestamp) Time() time.Time {
 
 type UnixMsTimestamp int64
 
+func TimeToMilliseconds(t time.Time) UnixMsTimestamp {
+	return UnixMsTimestamp(t.UnixNano() / int64(time.Millisecond))
+}
+
 func (t UnixMsTimestamp) String() string {
 	return t.Time().String()
 }
diff --git a/gateway/commands.go b/gateway/commands.go
index 0f0a429..9a3dbfa 100644
--- a/gateway/commands.go
+++ b/gateway/commands.go
@@ -88,8 +88,8 @@ func (g *Gateway) UpdateVoiceState(data UpdateVoiceStateData) error {
 }
 
 type UpdateStatusData struct {
-	Since discord.Milliseconds `json:"since,omitempty"` // 0 if not idle
-	Game  *discord.Activity    `json:"game,omitempty"`  // nullable
+	Since discord.UnixMsTimestamp `json:"since,omitempty"` // 0 if not idle
+	Game  *discord.Activity       `json:"game,omitempty"`  // nullable
 
 	Status discord.Status `json:"status"`
 	AFK    bool           `json:"afk"`