diff --git a/lib/views/room/playing_private_page.dart b/lib/views/room/playing_private_page.dart
index f3bac98..9a0476b 100644
--- a/lib/views/room/playing_private_page.dart
+++ b/lib/views/room/playing_private_page.dart
@@ -465,9 +465,10 @@ class _PlayingPrivatePageState extends State<PlayingPrivatePage> {
 
   // (★) Format countdown display (카운트다운 표시용)
   String _formatDuration(Duration d) {
+    final hh = d.inHours.toString().padLeft(2, '0');
     final mm = d.inMinutes.remainder(60).toString().padLeft(2, '0');
     final ss = d.inSeconds.remainder(60).toString().padLeft(2, '0');
-    return '$mm:$ss';
+    return '$hh:$mm:$ss';
   }
 
   @override
diff --git a/lib/views/room/playing_team_page.dart b/lib/views/room/playing_team_page.dart
index b87dbab..d3a3bf1 100644
--- a/lib/views/room/playing_team_page.dart
+++ b/lib/views/room/playing_team_page.dart
@@ -410,9 +410,10 @@ class _PlayingTeamPageState extends State<PlayingTeamPage> {
 
   // Format countdown (카운트다운 표시용)
   String _formatDuration(Duration d) {
+    final hh = d.inHours.toString().padLeft(2, '0');
     final mm = d.inMinutes.remainder(60).toString().padLeft(2, '0');
     final ss = d.inSeconds.remainder(60).toString().padLeft(2, '0');
-    return '$mm:$ss';
+    return '$hh:$mm:$ss';
   }
 
   @override