diff --git a/components/libc/armlibc/sys/errno.h b/components/libc/armlibc/sys/errno.h
index 6842877c4b..0aba5f5e19 100644
--- a/components/libc/armlibc/sys/errno.h
+++ b/components/libc/armlibc/sys/errno.h
@@ -50,6 +50,7 @@
 #define EPERM           1        /* Not super-user */
 #define ESRCH           3        /* No such process */
 #define EINTR           4        /* Interrupted system call */
+#define EACCES          13       /* Permission denied */
 #define EFAULT          14       /* Bad address */
 #define ENFILE          23       /* Too many open files in system */
 #define ERANGE          34       /* Math result not representable */
@@ -66,6 +67,7 @@
 #define ECONNABORTED    103      /* Software caused connection abort */
 #define ECONNRESET      104      /* Connection reset by peer */
 #define ENOBUFS         105      /* No buffer space available */
+#define EISCONN         106      /* Transport endpoint is already connected */
 #define ENOTCONN        107      /* Transport endpoint is not connected */
 #define EINPROGRESS     115      /* Operation now in progress */
 #define ETIMEDOUT       116      /* Connection timed out */