diff --git a/src/routes/api/options.ts b/src/routes/api/options.ts
index 33cd5fa8c..5cb103a31 100644
--- a/src/routes/api/options.ts
+++ b/src/routes/api/options.ts
@@ -14,6 +14,7 @@ const ALLOWED_OPTIONS = new Set([
     "eraseEntitiesAfterTimeInSeconds",
     "eraseEntitiesAfterTimeScale",
     "protectedSessionTimeout",
+    "protectedSessionTimeoutTimeScale",
     "revisionSnapshotTimeInterval",
     "revisionSnapshotNumberLimit",
     "zoomFactor",
diff --git a/src/services/options_init.ts b/src/services/options_init.ts
index 3bb87703e..394808c99 100644
--- a/src/services/options_init.ts
+++ b/src/services/options_init.ts
@@ -77,6 +77,7 @@ const defaultOptions: DefaultOption[] = [
     { name: "revisionSnapshotTimeInterval", value: "600", isSynced: true },
     { name: "revisionSnapshotNumberLimit", value: "-1", isSynced: true },
     { name: "protectedSessionTimeout", value: "600", isSynced: true },
+    { name: "protectedSessionTimeoutTimeScale", value: "60", isSynced: true },
     { name: "zoomFactor", value: isWindows ? "0.9" : "1.0", isSynced: false },
     { name: "overrideThemeFonts", value: "false", isSynced: false },
     { name: "mainFontFamily", value: "theme", isSynced: false },
diff --git a/src/services/options_interface.ts b/src/services/options_interface.ts
index fb234240c..c2da7e1b5 100644
--- a/src/services/options_interface.ts
+++ b/src/services/options_interface.ts
@@ -51,6 +51,7 @@ export interface OptionDefinitions extends KeyboardShortcutsOptions<KeyboardActi
     revisionSnapshotTimeInterval: number;
     revisionSnapshotNumberLimit: number;
     protectedSessionTimeout: number;
+    protectedSessionTimeoutTimeScale: number;
     zoomFactor: number;
     mainFontSize: number;
     treeFontSize: number;