diff --git a/backend/src/api/routes/quotes.ts b/backend/src/api/routes/quotes.ts
index a4e122ac7..dc26d4deb 100644
--- a/backend/src/api/routes/quotes.ts
+++ b/backend/src/api/routes/quotes.ts
@@ -159,6 +159,7 @@ router.post(
         .string()
         .valid(
           "Grammatical error",
+          "Duplicate quote",
           "Inappropriate content",
           "Low quality content",
           "Incorrect source"
diff --git a/frontend/src/html/popups.html b/frontend/src/html/popups.html
index f09682a2f..7cfd5f6e0 100644
--- a/frontend/src/html/popups.html
+++ b/frontend/src/html/popups.html
@@ -818,6 +818,7 @@
     <label>reason</label>
     <select name="report-reason" class="reason" title="reason">
       <option value="Grammatical error">Grammatical error</option>
+      <option value="Duplicate quote">Duplicate quote</option>
       <option value="Inappropriate content">Inappropriate content</option>
       <option value="Low quality content">Low quality content</option>
       <option value="Incorrect source">Incorrect source</option>