diff --git a/src/meta_schedule/database/database_utils.cc b/src/meta_schedule/database/database_utils.cc
index ce025540e496..22b0933db4b4 100644
--- a/src/meta_schedule/database/database_utils.cc
+++ b/src/meta_schedule/database/database_utils.cc
@@ -236,7 +236,8 @@ class JSONTokenizer {
           str.push_back('\t');
           break;
         default:
-          LOG(FATAL) << "ValueError: Unsupported escape sequence: \\" << *cur_;
+          LOG(FATAL) << "ValueError: Unsupported escape sequence: \\" << *cur_
+                     << ". record:" << std::string(cur_, end_);
       }
     }
     if (cur_ == end_) {