diff --git a/_locales/en/messages.json b/_locales/en/messages.json
index 4ba2c38cc4..08a2123e6a 100644
--- a/_locales/en/messages.json
+++ b/_locales/en/messages.json
@@ -1318,6 +1318,10 @@
     "messageformat": "All messages in this chat will be deleted from this device. You can still search for this chat after you delete messages.",
     "description": "Description for confirmation modal to delete all messages in a conversation"
   },
+  "icu:ConversationHeader__DeleteMessagesInConversationConfirmation__description-with-sync": {
+    "messageformat": "All messages in this chat will be deleted from all your devices. You can still search for this chat after you delete messages.",
+    "description": "Description for confirmation modal to delete all messages in a conversation"
+  },
   "icu:ConversationHeader__ContextMenu__LeaveGroupAction__title": {
     "messageformat": "Leave group",
     "description": "This is a button to leave a group"
diff --git a/ts/components/conversation/ConversationHeader.tsx b/ts/components/conversation/ConversationHeader.tsx
index 866cdff35c..5d905dcbb3 100644
--- a/ts/components/conversation/ConversationHeader.tsx
+++ b/ts/components/conversation/ConversationHeader.tsx
@@ -957,6 +957,14 @@ function DeleteMessagesConfirmationDialog({
     );
   }
 
+  const dialogBody = isDeleteSyncSendEnabled
+    ? i18n(
+        'icu:ConversationHeader__DeleteMessagesInConversationConfirmation__description-with-sync'
+      )
+    : i18n(
+        'icu:ConversationHeader__DeleteMessagesInConversationConfirmation__description'
+      );
+
   return (
     <ConfirmationDialog
       dialogName="ConversationHeader.destroyMessages"
@@ -973,9 +981,7 @@ function DeleteMessagesConfirmationDialog({
       i18n={i18n}
       onClose={onClose}
     >
-      {i18n(
-        'icu:ConversationHeader__DeleteMessagesInConversationConfirmation__description'
-      )}
+      {dialogBody}
     </ConfirmationDialog>
   );
 }