diff --git a/tools/db_bench_tool.cc b/tools/db_bench_tool.cc
index 0cc424eea..d10758f04 100644
--- a/tools/db_bench_tool.cc
+++ b/tools/db_bench_tool.cc
@@ -434,7 +434,7 @@ DEFINE_int32(file_opening_threads, rocksdb::Options().max_file_opening_threads,
              "If open_files is set to -1, this option set the number of "
              "threads that will be used to open files during DB::Open()");
 
-DEFINE_int32(new_table_reader_for_compaction_inputs, true,
+DEFINE_bool(new_table_reader_for_compaction_inputs, true,
              "If true, uses a separate file handle for compaction inputs");
 
 DEFINE_int32(compaction_readahead_size, 0, "Compaction readahead size");