diff --git a/include/mbedtls/ssl.h b/include/mbedtls/ssl.h
index 8ea0966..0477e91 100644
--- a/include/mbedtls/ssl.h
+++ b/include/mbedtls/ssl.h
@@ -98,6 +98,8 @@
 /* Error space gap */
 /** Processing of the Certificate handshake message failed. */
 #define MBEDTLS_ERR_SSL_BAD_CERTIFICATE                   -0x7A00
+/** Received NewSessionTicket Post Handshake Message */
+#define MBEDTLS_ERR_SSL_RECEIVED_NEW_SESSION_TICKET       -0x7B00
 /* Error space gap */
 /* Error space gap */
 /* Error space gap */