diff --git a/bsp/amebaz/applications/smartconfig_app.c b/bsp/amebaz/applications/smartconfig_app.c
index 4302fe7937..582bbf5d98 100644
--- a/bsp/amebaz/applications/smartconfig_app.c
+++ b/bsp/amebaz/applications/smartconfig_app.c
@@ -69,6 +69,7 @@ static int rt_wlan_device_connetct(char *ssid, char *passwd)
 
 static void airkiss_send_notification(uint8_t random)
 {
+    int i;
     int sock = -1;
     int udpbufsize = 2;
     struct sockaddr_in UDPBCAddr, UDPBCServerAddr;
@@ -102,7 +103,7 @@ static void airkiss_send_notification(uint8_t random)
         goto _exit;
     }
 
-    for (int i = 0; i <= 20; i++)
+    for (i = 0; i <= 20; i++)
     {
         int ret = sendto(sock, (char *)&random, 1, 0, (struct sockaddr *)&UDPBCAddr, sizeof(UDPBCAddr));
         rt_thread_delay(10);
diff --git a/components/drivers/wlan/wlan_cfg.c b/components/drivers/wlan/wlan_cfg.c
index 43fed8e6e8..126cee40f5 100644
--- a/components/drivers/wlan/wlan_cfg.c
+++ b/components/drivers/wlan/wlan_cfg.c
@@ -55,9 +55,12 @@ static rt_uint16_t rt_wlan_cal_crc(rt_uint8_t *buff, int len)
 
     while (len--)
     {
+        int i;
+
         wChar = *(buff++);
         wCRCin ^= (wChar << 8);
-        for (int i = 0; i < 8; i++)
+
+        for (i = 0; i < 8; i++)
         {
             if (wCRCin & 0x8000)
                 wCRCin = (wCRCin << 1) ^ wCPoly;