diff --git a/library/ssl_tls13_keys.c b/library/ssl_tls13_keys.c
index 357b3fb..99eb8a4 100644
--- a/library/ssl_tls13_keys.c
+++ b/library/ssl_tls13_keys.c
@@ -19,7 +19,7 @@
 
 #include "common.h"
 
-#if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
+#if defined(MBEDTLS_SSL_PROTO_TLS1_3)
 
 #include <stdint.h>
 #include <string.h>
@@ -1248,4 +1248,4 @@
     return( ret );
 }
 
-#endif /* MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL */
+#endif /* MBEDTLS_SSL_PROTO_TLS1_3 */