diff --git a/library/ssl_misc.h b/library/ssl_misc.h
index dff19c8..942d4ad 100644
--- a/library/ssl_misc.h
+++ b/library/ssl_misc.h
@@ -2145,6 +2145,38 @@
                                            unsigned char *buf,
                                            const unsigned char *end,
                                            size_t *out_len);
+
+#if defined(MBEDTLS_SSL_CLI_C)
+/*
+ * The client has not sent the first ClientHello yet, it is unknown if the
+ * client will send an early data indication extension or not.
+ */
+#define MBEDTLS_SSL_EARLY_DATA_STATUS_UNKNOWN 0
+
+/*
+ * The client has sent an early data indication extension in its first
+ * ClientHello, it has not received the response (ServerHello or
+ * HelloRetryRequest) from the server yet. The transform to protect early data
+ * is not set and early data cannot be sent yet.
+ */
+#define MBEDTLS_SSL_EARLY_DATA_STATUS_SENT 4
+
+/*
+ * The client has sent an early data indication extension in its first
+ * ClientHello, it has not received the response (ServerHello or
+ * HelloRetryRequest) from the server yet. The transform to protect early data
+ * has been set and early data can be written now.
+ */
+#define MBEDTLS_SSL_EARLY_DATA_STATUS_CAN_WRITE 5
+
+/*
+ * The client has sent an early data indication extension in its first
+ * ClientHello, the server has accepted them and the client has received the
+ * server Finished message. It cannot send early data to the server anymore.
+ */
+#define MBEDTLS_SSL_EARLY_DATA_STATUS_SERVER_FINISHED_RECEIVED 6
+#endif /* MBEDTLS_SSL_CLI_C */
+
 #endif /* MBEDTLS_SSL_EARLY_DATA */
 
 #endif /* MBEDTLS_SSL_PROTO_TLS1_3 */