diff --git a/visualdl/logic/sdk.h b/visualdl/logic/sdk.h
index 83ed47850577d8e2798c043e2dd5338f203d9d2e..f66db9ac4f371bd94d6e923860a74525f1f60aa5 100644
--- a/visualdl/logic/sdk.h
+++ b/visualdl/logic/sdk.h
@@ -126,7 +126,7 @@ struct ScalarReader {
   std::vector<T> ids() const;
   std::vector<T> timestamps() const;
   std::string caption() const;
-  size_t total_records() const { return reader_.total_records() - 1; }
+  size_t total_records() const { return reader_.total_records(); }
   size_t size() const;
 
 private: