diff --git a/addons/addon-progress/README.md b/addons/addon-progress/README.md
index a84a307c..bb61c92f 100644
--- a/addons/addon-progress/README.md
+++ b/addons/addon-progress/README.md
@@ -15,12 +15,12 @@ npm install --save @xterm/addon-progress
 
 ```ts
 import { Terminal } from '@xterm/xterm';
-import { ProgressAddon } from '@xterm/addon-progress';
+import { ProgressAddon, IProgressState } from '@xterm/addon-progress';
 
 const terminal = new Terminal();
 const progressAddon = new ProgressAddon();
 terminal.loadAddon(progressAddon);
-progressAddon.onChange({state, value}: IProgress) => {
+progressAddon.onChange({state, value}: IProgressState) => {
   // state: 0-4 integer (see below for meaning)
   // value: 0-100 integer (percent value)
   
diff --git a/addons/addon-progress/src/ProgressAddon.ts b/addons/addon-progress/src/ProgressAddon.ts
index 465cff47..24e57860 100644
--- a/addons/addon-progress/src/ProgressAddon.ts
+++ b/addons/addon-progress/src/ProgressAddon.ts
@@ -4,11 +4,11 @@
  */
 
 import type { Terminal, ITerminalAddon, IDisposable } from '@xterm/xterm';
-import type { ProgressAddon as IProgressApi, IProgress } from '@xterm/addon-progress';
+import type { ProgressAddon as IProgressApi, IProgressState } from '@xterm/addon-progress';
 import type { Emitter, Event } from 'vs/base/common/event';
 
 
-export const enum ProgressState {
+const enum ProgressType {
   REMOVE = 0,
   SET = 1,
   ERROR = 2,
@@ -35,10 +35,10 @@ function toInt(s: string): number {
 
 export class ProgressAddon implements ITerminalAddon, IProgressApi {
   private _seqHandler: IDisposable | undefined;
-  private _st: ProgressState = ProgressState.REMOVE;
+  private _st: ProgressType = ProgressType.REMOVE;
   private _pr = 0;
-  private _onChange: Emitter<IProgress> | undefined;
-  public onChange: Event<IProgress> | undefined;
+  private _onChange: Emitter<IProgressState> | undefined;
+  public onChange: Event<IProgressState> | undefined;
 
   public dispose(): void {
     this._seqHandler?.dispose();
@@ -62,19 +62,19 @@ export class ProgressAddon implements ITerminalAddon, IProgressApi {
       const pr = toInt(parts[2]);
 
       switch (st) {
-        case ProgressState.REMOVE:
+        case ProgressType.REMOVE:
           this.progress = { state: st, value: 0 };
           break;
-        case ProgressState.SET:
+        case ProgressType.SET:
           if (pr < 0) return true;  // faulty sequence, just exit
           this.progress = { state: st, value: pr };
           break;
-        case ProgressState.ERROR:
-        case ProgressState.PAUSE:
+        case ProgressType.ERROR:
+        case ProgressType.PAUSE:
           if (pr < 0) return true;  // faulty sequence, just exit
           this.progress = { state: st, value: pr || this._pr };
           break;
-        case ProgressState.INDETERMINATE:
+        case ProgressType.INDETERMINATE:
           this.progress = { state: st, value: this._pr };
           break;
       }
@@ -85,11 +85,11 @@ export class ProgressAddon implements ITerminalAddon, IProgressApi {
     this.onChange = this._onChange!.event;
   }
 
-  public get progress(): IProgress {
+  public get progress(): IProgressState {
     return { state: this._st, value: this._pr };
   }
 
-  public set progress(progress: IProgress) {
+  public set progress(progress: IProgressState) {
     if (progress.state < 0 || progress.state > 4) {
       console.warn(`progress state out of bounds, not applied`);
       return;
diff --git a/addons/addon-progress/typings/addon-progress.d.ts b/addons/addon-progress/typings/addon-progress.d.ts
index 5d96f422..923a2aa3 100644
--- a/addons/addon-progress/typings/addon-progress.d.ts
+++ b/addons/addon-progress/typings/addon-progress.d.ts
@@ -5,7 +5,7 @@
 
 import { Terminal, ITerminalAddon, IDisposable } from '@xterm/xterm';
 import type { Event } from 'vs/base/common/event';
-import type { ProgressState } from '../src/ProgressAddon';
+
 
 declare module '@xterm/addon-progress' {
   /**
@@ -33,7 +33,7 @@ declare module '@xterm/addon-progress' {
     /**
      * An event that fires when the tracked progress changes.
      */
-    public readonly onChange: Event<IProgress> | undefined;
+    public readonly onChange: Event<IProgressState> | undefined;
 
     /**
      * Gets or sets the current progress tracked by the addon.
@@ -41,14 +41,14 @@ declare module '@xterm/addon-progress' {
      * back to initial with `{state: 0, value: 0}`
      * or to restore an indicator.
      */
-    public progress: IProgress;
+    public progress: IProgressState;
   }
   
   /**
-   * Progress tracked by the addon.
+   * Progress state tracked by the addon.
    */
-  export interface IProgress {
-    state: ProgressState;
+  export interface IProgressState {
+    state: 0 | 1 | 2 | 3 | 4;
     value: number;
   }
 }
diff --git a/demo/client.ts b/demo/client.ts
index 6f448658..6c7b53ff 100644
--- a/demo/client.ts
+++ b/demo/client.ts
@@ -21,7 +21,7 @@ import { AttachAddon } from '@xterm/addon-attach';
 import { ClipboardAddon } from '@xterm/addon-clipboard';
 import { FitAddon } from '@xterm/addon-fit';
 import { LigaturesAddon } from '@xterm/addon-ligatures';
-import { ProgressAddon, IProgress } from '@xterm/addon-progress';
+import { ProgressAddon, IProgressState } from '@xterm/addon-progress';
 import { SearchAddon, ISearchOptions } from '@xterm/addon-search';
 import { SerializeAddon } from '@xterm/addon-serialize';
 import { WebLinksAddon } from '@xterm/addon-web-links';
@@ -1454,7 +1454,7 @@ function progressButtons(): void {
   const STATES = { 0: 'remove', 1: 'set', 2: 'error', 3: 'indeterminate', 4: 'pause' };
   const COLORS = { 0: '', 1: 'green', 2: 'red', 3: '', 4: 'yellow' };
 
-  function progressHandler({state, value}: IProgress) {
+  function progressHandler({state, value}: IProgressState) {
     // Simulate windows taskbar hack by windows terminal:
     // Since the taskbar has no means to indicate error/pause state other than by coloring
     // the current progress, we move 0 to 10% and distribute higher values in the remaining 90 %