diff --git a/src/vs/workbench/api/electron-browser/mainThreadQuickOpen.ts b/src/vs/workbench/api/electron-browser/mainThreadQuickOpen.ts
index 8751ff66638..6475757bb8d 100644
--- a/src/vs/workbench/api/electron-browser/mainThreadQuickOpen.ts
+++ b/src/vs/workbench/api/electron-browser/mainThreadQuickOpen.ts
@@ -29,7 +29,7 @@ export class MainThreadQuickOpen extends MainThreadQuickOpenShape {
 		this._quickOpenService = quickOpenService;
 	}
 
-	$show(options: IPickOptions): Thenable<number> {
+	$show(options: IPickOptions): TPromise<number> {
 
 		const myToken = ++this._token;
 
@@ -59,14 +59,14 @@ export class MainThreadQuickOpen extends MainThreadQuickOpenShape {
 		});
 	}
 
-	$setItems(items: MyQuickPickItems[]): Thenable<any> {
+	$setItems(items: MyQuickPickItems[]): TPromise<any> {
 		if (this._doSetItems) {
 			this._doSetItems(items);
 		}
 		return undefined;
 	}
 
-	$setError(error: Error): Thenable<any> {
+	$setError(error: Error): TPromise<any> {
 		if (this._doSetError) {
 			this._doSetError(error);
 		}
diff --git a/src/vs/workbench/api/node/extHost.protocol.ts b/src/vs/workbench/api/node/extHost.protocol.ts
index 8f6d2c8deb5..6d92223c932 100644
--- a/src/vs/workbench/api/node/extHost.protocol.ts
+++ b/src/vs/workbench/api/node/extHost.protocol.ts
@@ -264,9 +264,9 @@ export interface MyQuickPickItems extends IPickOpenEntry {
 	handle: number;
 }
 export abstract class MainThreadQuickOpenShape {
-	$show(options: IPickOptions): Thenable<number> { throw ni(); }
-	$setItems(items: MyQuickPickItems[]): Thenable<any> { throw ni(); }
-	$setError(error: Error): Thenable<any> { throw ni(); }
+	$show(options: IPickOptions): TPromise<number> { throw ni(); }
+	$setItems(items: MyQuickPickItems[]): TPromise<any> { throw ni(); }
+	$setError(error: Error): TPromise<any> { throw ni(); }
 	$input(options: vscode.InputBoxOptions, validateInput: boolean): TPromise<string> { throw ni(); }
 }