diff --git a/floyd/tools/cl.cc b/floyd/tools/cl.cc
index 1ea2208..6da2212 100644
--- a/floyd/tools/cl.cc
+++ b/floyd/tools/cl.cc
@@ -32,7 +32,7 @@ int cl(const std::string path) {
   RaftMeta *raft_meta = new RaftMeta(db, logger);
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   char buff[10];
   for (int i = 0; i < 10; i++) {
     Entry *entry = new Entry();
@@ -65,7 +65,7 @@ int cl_spec(const std::string path) {
   RaftMeta *raft_meta = new RaftMeta(db, logger);
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   char buff[10];
   for (int i = 0; i < 21; i++) {
     Entry *entry = new Entry();
diff --git a/floyd/tools/cl1.cc b/floyd/tools/cl1.cc
index 8da5b1c..87b2b12 100644
--- a/floyd/tools/cl1.cc
+++ b/floyd/tools/cl1.cc
@@ -43,7 +43,7 @@ int cl1(const std::string path) {
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
 
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   Entry *entry = new Entry();
   InitEntry(1, "1", "1", entry);
   entries.push_back(entry);
@@ -110,7 +110,7 @@ int cl2(const std::string path) {
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
 
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   Entry *entry = new Entry();
   InitEntry(1, "1", "1", entry);
   entries.push_back(entry);
@@ -173,7 +173,7 @@ int cl3(const std::string path) {
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
 
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   Entry *entry = new Entry();
   InitEntry(1, "1", "1", entry);
   entries.push_back(entry);
@@ -245,7 +245,7 @@ int cl4(const std::string path) {
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
 
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   Entry *entry = new Entry();
   InitEntry(1, "1", "1", entry);
   entries.push_back(entry);
@@ -300,7 +300,7 @@ int cl5(const std::string path) {
   raft_meta->Init();
   RaftLog *raft_log = new RaftLog(db, logger);
 
-  std::vector<Entry *> entries;
+  std::vector<const Entry *> entries;
   Entry *entry = new Entry();
   InitEntry(1, "1", "1", entry);
   entries.push_back(entry);