diff --git a/src/chassis-mainloop.h b/src/chassis-mainloop.h
index c6f7a60..e9cfaf6 100644
--- a/src/chassis-mainloop.h
+++ b/src/chassis-mainloop.h
@@ -68,6 +68,7 @@ typedef struct chassis chassis;
 #define MAX_DIST_TRAN_PREFIX 64
 #define DEFAULT_LIVE_TIME 7200
 
+#define DEFAULT_POOL_SIZE 10
 #define MAX_ALLOWED_PACKET_CEIL    (1 * GB)
 #define MAX_ALLOWED_PACKET_DEFAULT (32 * MB)
 #define MAX_ALLOWED_PACKET_FLOOR   (1 * KB)
diff --git a/src/chassis-options-utils.c b/src/chassis-options-utils.c
index b0d61b2..07f130c 100644
--- a/src/chassis-options-utils.c
+++ b/src/chassis-options-utils.c
@@ -454,7 +454,7 @@ show_default_pool_size(gpointer param) {
         return g_strdup_printf("%d", srv->mid_idle_connections);
     }
     if (CAN_SAVE_OPTS_PROPERTY(opt_type)) {
-        if (srv->mid_idle_connections == 100) {
+        if (srv->mid_idle_connections == DEFAULT_POOL_SIZE) {
             return NULL;
         }
         return g_strdup_printf("%d", srv->mid_idle_connections);
@@ -473,8 +473,8 @@ assign_default_pool_size(const gchar *newval, gpointer param) {
             gint value = 0;
                 if (try_get_int_value(newval, &value)) {
                     if (value >= 0) {
-                        if (value < 10) {
-                            value = 10;
+                        if (value < DEFAULT_POOL_SIZE) {
+                            value = DEFAULT_POOL_SIZE;
                         }
                         srv->mid_idle_connections = value;
 
diff --git a/src/mysql-proxy-cli.c b/src/mysql-proxy-cli.c
index 780acfa..6757609 100644
--- a/src/mysql-proxy-cli.c
+++ b/src/mysql-proxy-cli.c
@@ -190,7 +190,7 @@ chassis_frontend_new(void)
     frontend->is_client_compress_support = 0;
     frontend->xa_log_detailed = 0;
 
-    frontend->default_pool_size = 10;
+    frontend->default_pool_size = DEFAULT_POOL_SIZE;
     frontend->worker_processes = 1;
     frontend->max_resp_len = 10 * 1024 * 1024;  /* 10M */
     frontend->max_alive_time = DEFAULT_LIVE_TIME;
@@ -701,8 +701,8 @@ init_parameters(struct chassis_frontend_t *frontend, chassis *srv)
 
     g_message("set worker processes:%d", srv->worker_processes);
 
-    if (frontend->default_pool_size < 10) {
-        frontend->default_pool_size = 10;
+    if (frontend->default_pool_size < DEFAULT_POOL_SIZE) {
+        frontend->default_pool_size = DEFAULT_POOL_SIZE;
     }
 
     srv->mid_idle_connections = frontend->default_pool_size;