diff --git a/rag/nlp/search.py b/rag/nlp/search.py
index 86416cd49..1e83969e4 100644
--- a/rag/nlp/search.py
+++ b/rag/nlp/search.py
@@ -258,6 +258,8 @@ class Dealer:
         q_denor = np.sqrt(np.sum([s*s for t,s in query_rfea.items() if t != PAGERANK_FLD]))
         for i in search_res.ids:
             nor, denor = 0, 0
+            if not search_res.field[i].get(TAG_FLD):
+                continue
             for t, sc in eval(search_res.field[i].get(TAG_FLD, "{}")).items():
                 if t in query_rfea:
                     nor += query_rfea[t] * sc