diff --git a/plugins/decky-vault/main.py b/plugins/decky-vault/main.py
index 0e562b2..49f5aec 100644
--- a/plugins/decky-vault/main.py
+++ b/plugins/decky-vault/main.py
@@ -192,7 +192,7 @@ class Plugin:
 # DeckyVault MangoHud logging config
 output_folder=/tmp
 output_file=deckyvault-mangohud.log
-log_duration=0
+autostart_log=0
 fps
 frame_timing
 cpu_power
diff --git a/plugins/decky-vault/src/index.tsx b/plugins/decky-vault/src/index.tsx
index c63bbe3..92732b4 100644
--- a/plugins/decky-vault/src/index.tsx
+++ b/plugins/decky-vault/src/index.tsx
@@ -14,6 +14,7 @@ import { useSettings, useSession } from "./lib/store"
 import {
   readAndParseMangohudLog,
   clearMangohudLog,
+  writeMangohudConfig,
   getHardwareInfo,
   getOsVersion,
   getProtonVersion,
@@ -69,6 +70,8 @@ function Content() {
 
   // ── Handle start recording ────────────────────────────────────
   async function handleStart() {
+    // Write MangoHud config with autostart_log so logging begins immediately
+    await writeMangohudConfig()
     // Clear any previous log file
     await clearMangohudLog()
     startRecording()