diff --git a/src/main/resources/fess_indices/fess/doc.json b/src/main/resources/fess_indices/fess/doc.json
index 75ea3f7b5..10c845651 100644
--- a/src/main/resources/fess_indices/fess/doc.json
+++ b/src/main/resources/fess_indices/fess/doc.json
@@ -505,6 +505,10 @@
         "type": "string",
         "index": "not_analyzed"
       },
+      "label": {
+        "type": "string",
+        "index": "not_analyzed"
+      },
       "segment": {
         "type": "string",
         "index": "not_analyzed"