diff --git a/components/net/at/include/at.h b/components/net/at/include/at.h
index 0e93720ff0..0a385058a0 100644
--- a/components/net/at/include/at.h
+++ b/components/net/at/include/at.h
@@ -12,6 +12,7 @@
 #ifndef __AT_H__
 #define __AT_H__
 
+#include <stddef.h>
 #include <rtthread.h>
 
 #ifdef __cplusplus
diff --git a/components/net/at/src/at_cli.c b/components/net/at/src/at_cli.c
index 25fbb708f4..c589bb68a0 100644
--- a/components/net/at/src/at_cli.c
+++ b/components/net/at/src/at_cli.c
@@ -11,7 +11,7 @@
 #include <at.h>
 #include <stdio.h>
 #include <string.h>
-
+#include <stdint.h>
 #include <rtthread.h>
 #include <rtdevice.h>
 #include <rthw.h>
diff --git a/components/net/sal_socket/include/sal_netdb.h b/components/net/sal_socket/include/sal_netdb.h
index 50064ce343..9b1421270f 100644
--- a/components/net/sal_socket/include/sal_netdb.h
+++ b/components/net/sal_socket/include/sal_netdb.h
@@ -10,6 +10,7 @@
 #ifndef SAL_NETDB_H__
 #define SAL_NETDB_H__
 
+#include <stddef.h>
 #include "sal_socket.h"
 
 #ifdef __cplusplus
diff --git a/components/net/sal_socket/include/sal_socket.h b/components/net/sal_socket/include/sal_socket.h
index 497be47e41..c479d21c62 100644
--- a/components/net/sal_socket/include/sal_socket.h
+++ b/components/net/sal_socket/include/sal_socket.h
@@ -11,6 +11,7 @@
 #ifndef SAL_SOCKET_H__
 #define SAL_SOCKET_H__
 
+#include <stddef.h>
 #include <arpa/inet.h>
 
 #ifdef __cplusplus
diff --git a/components/net/sal_socket/include/socket/netdb.h b/components/net/sal_socket/include/socket/netdb.h
index 9d54953681..8394fddea5 100644
--- a/components/net/sal_socket/include/socket/netdb.h
+++ b/components/net/sal_socket/include/socket/netdb.h
@@ -16,6 +16,7 @@
 extern "C" {
 #endif
 
+#include <stddef.h>
 #include <sal_netdb.h>
 
 struct hostent *gethostbyname(const char *name);