diff --git a/src/history/history-entry-update.dto.ts b/src/history/history-entry-update.dto.ts
index 16963fe0a..3aa8e3735 100644
--- a/src/history/history-entry-update.dto.ts
+++ b/src/history/history-entry-update.dto.ts
@@ -7,6 +7,9 @@
 import { IsBoolean } from 'class-validator';
 
 export class HistoryEntryUpdateDto {
+  /**
+   * True if the note should be pinned
+   */
   @IsBoolean()
   pinStatus: boolean;
 }