diff --git a/include/mbedtls/ssl_ticket.h b/include/mbedtls/ssl_ticket.h
index 1bbd646..f3c6591 100644
--- a/include/mbedtls/ssl_ticket.h
+++ b/include/mbedtls/ssl_ticket.h
@@ -25,6 +25,7 @@
 #define MBEDTLS_SSL_TICKET_H
 
 #include "ssl.h"
+#include "aes.h"
 
 #ifdef __cplusplus
 extern "C" {