diff --git a/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt b/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
index 0c07d066..19a725c6 100644
--- a/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
+++ b/app/src/main/java/kr/co/vividnext/sodalive/chat/talk/room/ChatRoomActivity.kt
@@ -41,7 +41,7 @@ class ChatRoomActivity : BaseActivity<ActivityChatRoomBinding>(
 
     // 5.4 SharedPreferences (안내 메시지 접힘 상태 저장)
     private val prefs by lazy { getSharedPreferences("chat_room_prefs", MODE_PRIVATE) }
-    private fun noticePrefKey(roomId: Long) = "chat_notice_hidden_room_${'$'}roomId"
+    private fun noticePrefKey(roomId: Long) = "chat_notice_hidden_room_${roomId}"
     private fun isNoticeHidden(): Boolean = prefs.getBoolean(noticePrefKey(roomId), false)
     private fun setNoticeHidden(hidden: Boolean) {
         prefs.edit { putBoolean(noticePrefKey(roomId), hidden) }