diff --git a/library/version_features.c b/library/version_features.c
index e19e31455d..8d3f2adb00 100644
--- a/library/version_features.c
+++ b/library/version_features.c
@@ -537,6 +537,9 @@ static const char *features[] = {
 #if defined(MBEDTLS_X509_ON_DEMAND_PARSING)
     "MBEDTLS_X509_ON_DEMAND_PARSING",
 #endif /* MBEDTLS_X509_ON_DEMAND_PARSING */
+#if defined(MBEDTLS_X509_ALWAYS_FLUSH)
+    "MBEDTLS_X509_ALWAYS_FLUSH",
+#endif /* MBEDTLS_X509_ALWAYS_FLUSH */
 #if defined(MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3)
     "MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3",
 #endif /* MBEDTLS_X509_ALLOW_EXTENSIONS_NON_V3 */