diff --git a/assets/l10n/intl_en.arb b/assets/l10n/intl_en.arb
index cf6842c1c..98ee3a8d7 100644
--- a/assets/l10n/intl_en.arb
+++ b/assets/l10n/intl_en.arb
@@ -4660,5 +4660,6 @@
   "publicProfileDesc": "By enabling this option, I confirm that I am of legal age in my country of residence",
   "clickWordsInstructions": "Click on individual words for more activities.",
   "chooseBestDefinition": "Choose the best definition",
-  "chooseBaseForm": "Choose the base form"
+  "chooseBaseForm": "Choose the base form",
+  "notTheCodeError": "Sorry, that's not the code!"
 }
diff --git a/lib/pangea/controllers/class_controller.dart b/lib/pangea/controllers/class_controller.dart
index 3ba4c112d..89d5f077f 100644
--- a/lib/pangea/controllers/class_controller.dart
+++ b/lib/pangea/controllers/class_controller.dart
@@ -68,7 +68,11 @@ class ClassController extends BaseController {
     }
   }
 
-  Future<void> joinClasswithCode(BuildContext context, String classCode) async {
+  Future<void> joinClasswithCode(
+    BuildContext context,
+    String classCode, {
+    String? notFoundError,
+  }) async {
     final client = Matrix.of(context).client;
     final space = await showFutureLoadingDialog<Room?>(
       context: context,
@@ -88,7 +92,7 @@ class ClassController extends BaseController {
           throw L10n.of(context).tooManyRequest;
         }
         if (knockResponse.statusCode != 200) {
-          throw L10n.of(context).unableToFindClass;
+          throw notFoundError ?? L10n.of(context).unableToFindClass;
         }
 
         final knockResult = jsonDecode(knockResponse.body);
@@ -106,7 +110,7 @@ class ClassController extends BaseController {
         }
 
         if (foundClasses.isEmpty) {
-          throw L10n.of(context).unableToFindClass;
+          throw notFoundError ?? L10n.of(context).unableToFindClass;
         }
 
         final chosenClassId = foundClasses.first;
diff --git a/lib/widgets/public_room_bottom_sheet.dart b/lib/widgets/public_room_bottom_sheet.dart
index adee798e1..9c4bf4946 100644
--- a/lib/widgets/public_room_bottom_sheet.dart
+++ b/lib/widgets/public_room_bottom_sheet.dart
@@ -54,6 +54,7 @@ class PublicRoomBottomSheetState extends State<PublicRoomBottomSheet> {
     await MatrixState.pangeaController.classController.joinClasswithCode(
       context,
       _codeController.text,
+      notFoundError: L10n.of(context).notTheCodeError,
     );
   }