diff --git a/rslib/backend.proto b/rslib/backend.proto
index 434241e1a..2a5e213b3 100644
--- a/rslib/backend.proto
+++ b/rslib/backend.proto
@@ -775,12 +775,17 @@ message FilterToSearchIn {
     NO_FLAG = 15;
     ANY_FLAG = 16;
   }
+  message DupeIn {
+    NoteTypeID mid = 1;
+    string text = 2;
+  }
   oneof filter {
     NamedFilter name = 1;
     string tag = 2;
     string deck = 3;
     string note = 4;
     uint32 template = 5;
+    DupeIn dupe = 6;
   }
 }
 
diff --git a/rslib/src/backend/mod.rs b/rslib/src/backend/mod.rs
index ea8a90a26..10c7c5e00 100644
--- a/rslib/src/backend/mod.rs
+++ b/rslib/src/backend/mod.rs
@@ -327,6 +327,10 @@ impl From<pb::FilterToSearchIn> for Node<'_> {
             Filter::Template(u) => {
                 Node::Search(SearchNode::CardTemplate(TemplateKind::Ordinal(u as u16)))
             }
+            Filter::Dupe(dupe) => Node::Search(SearchNode::Duplicates {
+                note_type_id: dupe.mid.unwrap_or(pb::NoteTypeId { ntid: 0 }).into(),
+                text: dupe.text.into(),
+            }),
         }
     }
 }