diff --git a/include/cppjieba/DictTrie.hpp b/include/cppjieba/DictTrie.hpp
index 82add4b..6935f3b 100644
--- a/include/cppjieba/DictTrie.hpp
+++ b/include/cppjieba/DictTrie.hpp
@@ -111,7 +111,7 @@ class DictTrie {
         MakeNodeInfo(node_info, 
               buf[0], 
               user_word_default_weight_,
-              (buf.size() == 2 ? buf[1] : UNKNOWN_TAG));
+              (buf.size() == 3 ? buf[2] : UNKNOWN_TAG));
         static_node_infos_.push_back(node_info);
         if (node_info.word.size() == 1) {
           user_dict_single_chinese_word_.insert(node_info.word[0]);