diff --git a/src/vs/workbench/api/node/extHost.api.impl.ts b/src/vs/workbench/api/node/extHost.api.impl.ts
index b450e6538e6300897b7d55038fe1dddd6be6ba55..9f3ed92538c46c47aa9506c01eac00853e70dccb 100644
--- a/src/vs/workbench/api/node/extHost.api.impl.ts
+++ b/src/vs/workbench/api/node/extHost.api.impl.ts
@@ -408,7 +408,7 @@ export function createApiFactory(
 			onWillSaveTextDocument: (listener, thisArgs?, disposables?) => {
 				return extHostDocumentSaveParticipant.onWillSaveTextDocumentEvent(listener, thisArgs, disposables);
 			},
-			onDidChangeConfiguration: (listener: () => any, thisArgs?: any, disposables?: extHostTypes.Disposable[]) => {
+			onDidChangeConfiguration: (listener: (_: any) => any, thisArgs?: any, disposables?: extHostTypes.Disposable[]) => {
 				return extHostConfiguration.onDidChangeConfiguration(listener, thisArgs, disposables);
 			},
 			getConfiguration: (section?: string): vscode.WorkspaceConfiguration => {
diff --git a/src/vs/workbench/api/node/extHostSCM.ts b/src/vs/workbench/api/node/extHostSCM.ts
index 9d40839b17791c1b6d6ed2362ff08f1d5cde8433..8a87e5126c07fe3e2ca86b0dc9de87d8207eb6b2 100644
--- a/src/vs/workbench/api/node/extHostSCM.ts
+++ b/src/vs/workbench/api/node/extHostSCM.ts
@@ -316,14 +316,14 @@ export class ExtHostSCM {
 		return sourceControl;
 	}
 
-	$provideOriginalResource(sourceControlHandle: number, uri: URI): TPromise<vscode.Uri> {
+	$provideOriginalResource(sourceControlHandle: number, uri: URI): TPromise<URI> {
 		const sourceControl = this._sourceControls.get(sourceControlHandle);
 
 		if (!sourceControl || !sourceControl.quickDiffProvider) {
 			return TPromise.as(null);
 		}
 
-		return asWinJsPromise(token => sourceControl.quickDiffProvider.provideOriginalResource(uri, token));
+		return asWinJsPromise(token => URI.parse(sourceControl.quickDiffProvider.provideOriginalResource(uri, token).toString()));
 	}
 
 	$onActiveSourceControlChange(handle: number): TPromise<void> {