diff --git a/src/vs/platform/keybinding/browser/keybindingServiceImpl.ts b/src/vs/platform/keybinding/browser/keybindingServiceImpl.ts
index af0ccb3dd2463611b764f51ba2b22a26bc68fa65..048a81e0334da32f2bdc67434f0e4e2319328ffa 100644
--- a/src/vs/platform/keybinding/browser/keybindingServiceImpl.ts
+++ b/src/vs/platform/keybinding/browser/keybindingServiceImpl.ts
@@ -142,7 +142,7 @@ export class AbstractKeybindingService {
 		throw new Error('Not implemented');
 	}
 
-	public executeCommand(commandId: string, args:any): void {
+	public executeCommand(commandId: string, args:any): TPromise<any> {
 		throw new Error('Not implemented');
 	}
 }
@@ -300,7 +300,7 @@ export class KeybindingService extends AbstractKeybindingService implements IKey
 		delete this._contexts[String(contextId)];
 	}
 
-	public executeCommand(commandId: string, args:any = {}): any {
+	public executeCommand(commandId: string, args:any = {}): TPromise<any> {
 		if (!args.context) {
 			var contextId = this._findContextAttr(<HTMLElement>document.activeElement);
 			var context = this.getContext(contextId);
@@ -309,9 +309,7 @@ export class KeybindingService extends AbstractKeybindingService implements IKey
 			args.context = contextValue;
 		}
 
-		return this._invokeHandler(commandId, args).done(undefined, err => {
-			this._messageService.show(Severity.Warning, err);
-		});
+		return this._invokeHandler(commandId, args);
 	}
 }
 
@@ -356,8 +354,8 @@ class ScopedKeybindingService extends AbstractKeybindingService {
 		this._parent.disposeContext(contextId);
 	}
 
-	public executeCommand(commandId: string, args:any): void {
-		this._parent.executeCommand(commandId, args);
+	public executeCommand(commandId: string, args:any): TPromise<any> {
+		return this._parent.executeCommand(commandId, args);
 	}
 }
 
diff --git a/src/vs/platform/keybinding/common/keybindingService.ts b/src/vs/platform/keybinding/common/keybindingService.ts
index 634383082b1abf355c8032a223af71feac2b6a68..5d33814597c2dfc83f7bd9ac1b444f71da49d803 100644
--- a/src/vs/platform/keybinding/common/keybindingService.ts
+++ b/src/vs/platform/keybinding/common/keybindingService.ts
@@ -4,6 +4,7 @@
  *--------------------------------------------------------------------------------------------*/
 'use strict';
 
+import {TPromise} from 'vs/base/common/winjs.base';
 import {createDecorator, IInstantiationService, ServiceIdentifier, ServicesAccessor} from 'vs/platform/instantiation/common/instantiation';
 import {Keybinding} from 'vs/base/common/keyCodes';
 
@@ -82,5 +83,6 @@ export interface IKeybindingService {
 	lookupKeybindings(commandId: string): Keybinding[];
 	customKeybindingsCount(): number;
 
-	executeCommand(commandId: string, args?: any): any;
+	executeCommand<T>(commandId: string, args?: any): TPromise<T>;
+	executeCommand(commandId: string, args?: any): TPromise<any>;
 }
diff --git a/src/vs/workbench/api/common/pluginHostCommands.ts b/src/vs/workbench/api/common/pluginHostCommands.ts
index 20d9ca171a5f05532b99762504360d56e15ca2e8..43e01007d31af84775463eec17d341e242ed894b 100644
--- a/src/vs/workbench/api/common/pluginHostCommands.ts
+++ b/src/vs/workbench/api/common/pluginHostCommands.ts
@@ -148,7 +148,7 @@ export class MainThreadCommands {
 	}
 
 	_executeCommand<T>(id: string, args: any[]): Thenable<T> {
-		return TPromise.as(this._keybindingService.executeCommand(id, args));
+		return this._keybindingService.executeCommand(id, args);
 	}
 
 	_getCommands(): Thenable<string[]> {
diff --git a/src/vs/workbench/test/browser/servicesTestUtils.ts b/src/vs/workbench/test/browser/servicesTestUtils.ts
index 44c226bc3c21c8fdbc428129e0f5ab085960f6a0..fc87c3db398505aae60c9be04f4c556db5ab6d34 100644
--- a/src/vs/workbench/test/browser/servicesTestUtils.ts
+++ b/src/vs/workbench/test/browser/servicesTestUtils.ts
@@ -153,7 +153,7 @@ export class TestKeybindingService implements IKeybindingService {
 	public setInstantiationService(instantiationService: IInstantiationService): void { }
 	public setContext(key: string, value: any): void { }
 	public removeContext(key: string): void { }
-	public executeCommand(commandId: string, args: any): void { }
+	public executeCommand(commandId: string, args: any): TPromise<any> { return; }
 
 	public createKey<T>(key: string, defaultValue: T): IKeybindingContextKey<T> {
 		return null;