diff --git a/src/common/services/LogService.ts b/src/common/services/LogService.ts
index fb5bfded..b297049e 100644
--- a/src/common/services/LogService.ts
+++ b/src/common/services/LogService.ts
@@ -33,7 +33,8 @@ const LOG_PREFIX = 'xterm.js: ';
 export class LogService extends Disposable implements ILogService {
   public serviceBrand: any;
 
-  public logLevel: LogLevelEnum = LogLevelEnum.OFF;
+  private _logLevel: LogLevelEnum = LogLevelEnum.OFF;
+  public get logLevel(): LogLevelEnum { return this._logLevel; }
 
   constructor(
     @IOptionsService private readonly _optionsService: IOptionsService
@@ -44,7 +45,7 @@ export class LogService extends Disposable implements ILogService {
   }
 
   private _updateLogLevel(): void {
-    this.logLevel = optionsKeyToLogLevel[this._optionsService.rawOptions.logLevel];
+    this._logLevel = optionsKeyToLogLevel[this._optionsService.rawOptions.logLevel];
   }
 
   private _evalLazyOptionalParams(optionalParams: any[]): void {
@@ -61,25 +62,25 @@ export class LogService extends Disposable implements ILogService {
   }
 
   public debug(message: string, ...optionalParams: any[]): void {
-    if (this.logLevel <= LogLevelEnum.DEBUG) {
+    if (this._logLevel <= LogLevelEnum.DEBUG) {
       this._log(this._optionsService.options.logger?.debug.bind(this._optionsService.options.logger) ?? console.log, message, optionalParams);
     }
   }
 
   public info(message: string, ...optionalParams: any[]): void {
-    if (this.logLevel <= LogLevelEnum.INFO) {
+    if (this._logLevel <= LogLevelEnum.INFO) {
       this._log(this._optionsService.options.logger?.info.bind(this._optionsService.options.logger) ?? console.info, message, optionalParams);
     }
   }
 
   public warn(message: string, ...optionalParams: any[]): void {
-    if (this.logLevel <= LogLevelEnum.WARN) {
+    if (this._logLevel <= LogLevelEnum.WARN) {
       this._log(this._optionsService.options.logger?.warn.bind(this._optionsService.options.logger) ?? console.warn, message, optionalParams);
     }
   }
 
   public error(message: string, ...optionalParams: any[]): void {
-    if (this.logLevel <= LogLevelEnum.ERROR) {
+    if (this._logLevel <= LogLevelEnum.ERROR) {
       this._log(this._optionsService.options.logger?.error.bind(this._optionsService.options.logger) ?? console.error, message, optionalParams);
     }
   }
diff --git a/src/common/services/Services.ts b/src/common/services/Services.ts
index 10c2fbb7..b4021e45 100644
--- a/src/common/services/Services.ts
+++ b/src/common/services/Services.ts
@@ -157,7 +157,7 @@ export const ILogService = createDecorator<ILogService>('LogService');
 export interface ILogService {
   serviceBrand: undefined;
 
-  logLevel: LogLevelEnum;
+  readonly logLevel: LogLevelEnum;
 
   debug(message: any, ...optionalParams: any[]): void;
   info(message: any, ...optionalParams: any[]): void;