diff --git a/components/lwip/include/lwip/port/lwipopts.h b/components/lwip/include/lwip/port/lwipopts.h
index 65b3889f0b..99520f1cd9 100755
--- a/components/lwip/include/lwip/port/lwipopts.h
+++ b/components/lwip/include/lwip/port/lwipopts.h
@@ -405,7 +405,7 @@ extern unsigned char misc_prof_get_tcp_snd_buf(void);
 /**
  * SO_REUSE==1: Enable SO_REUSEADDR option.
  */
-#define SO_REUSE                        0
+#define SO_REUSE                        1
 
 /*
    ----------------------------------------
diff --git a/components/mbedtls/port/net.c b/components/mbedtls/port/net.c
index 482a11f970..45aa4b2deb 100644
--- a/components/mbedtls/port/net.c
+++ b/components/mbedtls/port/net.c
@@ -147,7 +147,7 @@ int mbedtls_net_bind( mbedtls_net_context *ctx, const char *bind_ip, const char
 
         /*SO_REUSEADDR option dafault is disable in source code(lwip)*/
 #if SO_REUSE
-        n = 1;
+        int n = 1;
         if ( setsockopt( ctx->fd, SOL_SOCKET, SO_REUSEADDR,
                          (const char *) &n, sizeof( n ) ) != 0 ) {
             close( ctx->fd );