diff --git a/lib/screens/channel/channel_chat.dart b/lib/screens/channel/channel_chat.dart
index 262a11f..2d1697d 100644
--- a/lib/screens/channel/channel_chat.dart
+++ b/lib/screens/channel/channel_chat.dart
@@ -201,9 +201,10 @@ class _ChannelChatScreenState extends State<ChannelChatScreen>
     String title = _channel?.name ?? 'loading'.tr;
     String? placeholder;
 
-    if (_channel?.type == 1) {
-      final otherside =
-          _channel!.members!.where((e) => e.account.id != _accountId).first;
+    final otherside =
+        _channel!.members!.where((e) => e.account.id != _accountId).firstOrNull;
+
+    if (_channel?.type == 1 && otherside != null) {
       title = otherside.account.nick;
       placeholder = 'messageInputPlaceholder'.trParams(
         {'channel': '@${otherside.account.name}'},
diff --git a/lib/widgets/channel/channel_list.dart b/lib/widgets/channel/channel_list.dart
index cd2b3b9..6ea43a1 100644
--- a/lib/widgets/channel/channel_list.dart
+++ b/lib/widgets/channel/channel_list.dart
@@ -132,10 +132,10 @@ class _ChannelListWidgetState extends State<ChannelListWidget> {
         ? const EdgeInsets.symmetric(horizontal: 20)
         : const EdgeInsets.symmetric(horizontal: 16);
 
-    if (item.type == 1) {
-      final otherside =
-          item.members!.where((e) => e.account.id != widget.selfId).first;
+    final otherside =
+        item.members!.where((e) => e.account.id != widget.selfId).firstOrNull;
 
+    if (item.type == 1 && otherside != null) {
       final avatar = AccountAvatar(
         content: otherside.account.avatar,
         radius: widget.isDense ? 12 : 20,