diff --git a/library/ssl_tls13_generic.c b/library/ssl_tls13_generic.c
index 1ad03a9..d1646eb 100644
--- a/library/ssl_tls13_generic.c
+++ b/library/ssl_tls13_generic.c
@@ -19,9 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_SSL_TLS_C)
-
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
+#if defined(MBEDTLS_SSL_TLS_C) && defined(MBEDTLS_SSL_PROTO_TLS1_3)
 
 #include <string.h>
 
@@ -1276,6 +1274,4 @@
     return( ret );
 }
 
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */
-
-#endif /* MBEDTLS_SSL_TLS_C */
+#endif /* MBEDTLS_SSL_TLS_C && MBEDTLS_SSL_PROTO_TLS1_3 */