diff --git a/bridgev2/portal.go b/bridgev2/portal.go
index 4637d6ba..5db45268 100644
--- a/bridgev2/portal.go
+++ b/bridgev2/portal.go
@@ -3822,6 +3822,9 @@ func (portal *Portal) getBridgeInfo() (string, event.BridgeEventContent) {
 	if portal.RoomType == database.RoomTypeDM || portal.RoomType == database.RoomTypeGroupDM {
 		bridgeInfo.BeeperRoomType = "dm"
 	}
+	if bridgeInfo.Protocol.ID == "slackgo" {
+		bridgeInfo.TempSlackRemoteIDMigratedFlag = true
+	}
 	parent := portal.GetTopLevelParent()
 	if parent != nil {
 		bridgeInfo.Network = &event.BridgeInfoSection{
diff --git a/event/state.go b/event/state.go
index ba7c608d..ed5434c9 100644
--- a/event/state.go
+++ b/event/state.go
@@ -231,6 +231,8 @@ type BridgeEventContent struct {
 
 	BeeperRoomType   string `json:"com.beeper.room_type,omitempty"`
 	BeeperRoomTypeV2 string `json:"com.beeper.room_type.v2,omitempty"`
+
+	TempSlackRemoteIDMigratedFlag bool `json:"com.beeper.slack_remote_id_migrated,omitempty"`
 }
 
 // DisappearingType represents the type of a disappearing message timer.