diff --git a/components/net/at/at_socket/at_socket.c b/components/net/at/at_socket/at_socket.c
index 6d4c040856fe624143d5acd6ce5db75e91701960..46d158dabf762e824570a71cef0a32d76b2c55f7 100644
--- a/components/net/at/at_socket/at_socket.c
+++ b/components/net/at/at_socket/at_socket.c
@@ -13,6 +13,7 @@
 #include <string.h>
 #include <ctype.h>
 #include <sys/time.h>
+#include <sys/errno.h>
 
 #include <at_socket.h>
 #include <at_device.h>