diff --git a/tidb-configuration-file.md b/tidb-configuration-file.md
index 56c1913876366..c856bb976f7b1 100644
--- a/tidb-configuration-file.md
+++ b/tidb-configuration-file.md
@@ -326,6 +326,11 @@ Configuration items related to security.
 + Default value: `"plaintext"`, which disables encryption.
 + Optional values: `"plaintext"` and `"aes128-ctr"`
 
+### `auto-tls`
+
+- Determines whether to automatically generate the TLS certificates on startup.
+- Default value: `true`
+
 ## Performance
 
 Configuration items related to performance.