diff --git a/c/tem/ctl.c b/c/tem/ctl.c
index 9afc1cf..5080c25 100644
--- a/c/tem/ctl.c
+++ b/c/tem/ctl.c
@@ -272,6 +272,8 @@ Ctl *init_tem(log_manager *logmanager)
     tem->infifo = infifo;
     tem->index = 0;
     tem->logmanager = logmanager;
+    char *his_buf[HISTORY_BUF] = {NULL};
+    memcpy(tem->history,his_buf,HISTORY_BUF);
     for(int i =0;i<6;i++)
     {
         tem->history[i] = NULL;
diff --git a/c/tem/ctl.h b/c/tem/ctl.h
index 12547bf..97d0083 100644
--- a/c/tem/ctl.h
+++ b/c/tem/ctl.h
@@ -6,7 +6,7 @@
 #include "interpreter/interpreter.h"
 
 #define MAX_BUF 256
-#define HISTORY_BUF 256
+#define HISTORY_BUF 210
 #define PROMPT "chatbot$$ "