diff --git a/docs/proxy/config_settings.md b/docs/proxy/config_settings.md
index 9ddb261f2..a33be0b2e 100644
--- a/docs/proxy/config_settings.md
+++ b/docs/proxy/config_settings.md
@@ -1341,6 +1341,7 @@ router_settings:
 | REDIS_GCP_SSL_CA_CERTS | Path to SSL CA certificate file for secure GCP Memorystore Redis connections
 | REDOC_URL | The path to the Redoc Fast API documentation. **By default this is "/redoc"**
 | REPEATED_STREAMING_CHUNK_LIMIT | Limit for repeated streaming chunks to detect looping. Default is 100
+| REALTIME_CREDENTIAL_RESOLUTION_TIMEOUT_SECONDS | Timeout in seconds for fetching the Vertex AI access token before a realtime session starts. Default is 20.0
 | REALTIME_WEBSOCKET_MAX_MESSAGE_SIZE_BYTES | Maximum size in bytes for WebSocket messages in realtime connections. Default is None.
 | REPLICATE_MODEL_NAME_WITH_ID_LENGTH | Length of Replicate model names with ID. Default is 64
 | REPLICATE_POLLING_DELAY_SECONDS | Delay in seconds for Replicate polling operations. Default is 0.5