diff --git a/cpp/include/gar/reader/arrow_chunk_reader.h b/cpp/include/gar/reader/arrow_chunk_reader.h
index 1da8cf93a..abbd9ae9a 100644
--- a/cpp/include/gar/reader/arrow_chunk_reader.h
+++ b/cpp/include/gar/reader/arrow_chunk_reader.h
@@ -85,7 +85,7 @@ class VertexPropertyArrowChunkReader {
     }
     if (chunk_index_ >= chunk_num_) {
       return Status::IndexError("Internal vertex id ", id,
-                                " is not out of range [0,",
+                                " is out of range [0,",
                                 chunk_num_ * vertex_info_.GetChunkSize(),
                                 ") of vertex ", vertex_info_.GetLabel());
     }
diff --git a/cpp/include/gar/reader/chunk_info_reader.h b/cpp/include/gar/reader/chunk_info_reader.h
index fe0fee67b..d7ce2f8fc 100644
--- a/cpp/include/gar/reader/chunk_info_reader.h
+++ b/cpp/include/gar/reader/chunk_info_reader.h
@@ -72,7 +72,7 @@ class VertexPropertyChunkInfoReader {
     chunk_index_ = id / vertex_info_.GetChunkSize();
     if (chunk_index_ >= chunk_num_) {
       return Status::IndexError("Internal vertex id ", id,
-                                " is not out of range [0,",
+                                " is out of range [0,",
                                 chunk_num_ * vertex_info_.GetChunkSize(),
                                 ") of vertex ", vertex_info_.GetLabel());
     }
diff --git a/cpp/src/reader_utils.cc b/cpp/src/reader_utils.cc
index c400afcfb..08b0cc49f 100644
--- a/cpp/src/reader_utils.cc
+++ b/cpp/src/reader_utils.cc
@@ -50,7 +50,7 @@ Result<std::pair<IdType, IdType>> GetAdjListOffsetOfVertex(
   } else {
     return Status::Invalid(
         "The adj list type has to be ordered_by_source or ordered_by_dest, but "
-        "got " +
+        "got ",
         std::string(AdjListTypeToString(adj_list_type)));
   }