diff --git a/runtime/onnxruntime/src/util.cpp b/runtime/onnxruntime/src/util.cpp
index 7723e5f4e..4fd1814b2 100644
--- a/runtime/onnxruntime/src/util.cpp
+++ b/runtime/onnxruntime/src/util.cpp
@@ -584,7 +584,7 @@ std::string TimestampSentence(std::string &text, std::string &str_time){
                 }
             }
             // format
-            ts_sent += "{'text_seg':\"" + text_seg + "\",";
+            ts_sent += "{'text_seg':\\\"" + text_seg + "\\\",";
             ts_sent += "'punc':'" + characters[idx_str] + "',";
             ts_sent += "'start':'" + to_string(start) + "',";
             ts_sent += "'end':'" + to_string(end) + "',";
@@ -621,7 +621,7 @@ std::string TimestampSentence(std::string &text, std::string &str_time){
             end = ts_seg[ts_seg.size()-1][1];
         }
         // format
-        ts_sent += "{'text_seg':\"" + text_seg + "\",";
+        ts_sent += "{'text_seg':\\\"" + text_seg + "\\\",";
         ts_sent += "'punc':'',";
         ts_sent += "'start':'" + to_string(start) + "',";
         ts_sent += "'end':'" + to_string(end) + "',";