diff --git a/src/vs/workbench/api/node/extHostTypeConverters.ts b/src/vs/workbench/api/node/extHostTypeConverters.ts
index ddc7c9ca424cbdcd3920449bef1419263889984f..30ab99b0b4733ed8624f0c5b16bf658ea3782212 100644
--- a/src/vs/workbench/api/node/extHostTypeConverters.ts
+++ b/src/vs/workbench/api/node/extHostTypeConverters.ts
@@ -19,7 +19,6 @@ import { IPosition } from 'vs/editor/common/core/position';
 import { IRange } from 'vs/editor/common/core/range';
 import { ISelection } from 'vs/editor/common/core/selection';
 import * as htmlContent from 'vs/base/common/htmlContent';
-import { IRelativePattern } from 'vs/base/common/glob';
 import * as languageSelector from 'vs/editor/common/modes/languageSelector';
 import { WorkspaceEditDto, ResourceTextEditDto, ResourceFileEditDto } from 'vs/workbench/api/node/extHost.protocol';
 import { MarkerSeverity, IRelatedInformation, IMarkerData, MarkerTag } from 'vs/platform/markers/common/markers';
@@ -744,7 +743,11 @@ export namespace TextEditorOptions {
 
 export namespace GlobPattern {
 
-	export function from(pattern: vscode.GlobPattern): string | IRelativePattern {
+	export function from(pattern: vscode.GlobPattern): string | types.RelativePattern {
+		if (pattern instanceof types.RelativePattern) {
+			return pattern;
+		}
+
 		if (typeof pattern === 'string') {
 			return pattern;
 		}
diff --git a/src/vs/workbench/api/node/extHostTypes.ts b/src/vs/workbench/api/node/extHostTypes.ts
index 4cd8e8051d131f04b00e7c24aa5be2294cca9fbe..063fea102d30b1212eded925c4d0737078063729 100644
--- a/src/vs/workbench/api/node/extHostTypes.ts
+++ b/src/vs/workbench/api/node/extHostTypes.ts
@@ -1821,6 +1821,8 @@ export enum ConfigurationTarget {
 
 export class RelativePattern implements IRelativePattern {
 	base: string;
+	baseFolder?: URI;
+
 	pattern: string;
 
 	constructor(base: vscode.WorkspaceFolder | string, pattern: string) {
@@ -1834,7 +1836,13 @@ export class RelativePattern implements IRelativePattern {
 			throw illegalArgument('pattern');
 		}
 
-		this.base = typeof base === 'string' ? base : base.uri.fsPath;
+		if (typeof base === 'string') {
+			this.base = base;
+		} else {
+			this.baseFolder = base.uri;
+			this.base = base.uri.fsPath;
+		}
+
 		this.pattern = pattern;
 	}
 
diff --git a/src/vs/workbench/api/node/extHostWorkspace.ts b/src/vs/workbench/api/node/extHostWorkspace.ts
index 0aca78832455f1d2f3d7ec4dc4d5056812e7b44c..9d23d2db98592499c7d9448a0faf66dafbdb0396 100644
--- a/src/vs/workbench/api/node/extHostWorkspace.ts
+++ b/src/vs/workbench/api/node/extHostWorkspace.ts
@@ -20,7 +20,7 @@ import { ILogService } from 'vs/platform/log/common/log';
 import { Severity } from 'vs/platform/notification/common/notification';
 import { IQueryOptions, IRawFileMatch2 } from 'vs/platform/search/common/search';
 import { Workspace, WorkspaceFolder } from 'vs/platform/workspace/common/workspace';
-import { Range } from 'vs/workbench/api/node/extHostTypes';
+import { Range, RelativePattern } from 'vs/workbench/api/node/extHostTypes';
 import { IExtensionDescription } from 'vs/workbench/services/extensions/common/extensions';
 import * as vscode from 'vscode';
 import { ExtHostWorkspaceShape, IMainContext, IWorkspaceData, MainContext, MainThreadMessageServiceShape, MainThreadWorkspaceShape } from './extHost.protocol';
@@ -346,7 +346,7 @@ export class ExtHostWorkspace implements ExtHostWorkspaceShape {
 
 	// --- search ---
 
-	findFiles(include: vscode.GlobPattern, exclude: vscode.GlobPattern, maxResults: number, extensionId: string, token: vscode.CancellationToken = CancellationToken.None): Thenable<vscode.Uri[]> {
+	findFiles(include: string | RelativePattern, exclude: vscode.GlobPattern, maxResults: number, extensionId: string, token: vscode.CancellationToken = CancellationToken.None): Thenable<vscode.Uri[]> {
 		this._logService.trace(`extHostWorkspace#findFiles: fileSearch, extension: ${extensionId}, entryPoint: findFiles`);
 
 		let includePattern: string;
@@ -357,6 +357,7 @@ export class ExtHostWorkspace implements ExtHostWorkspaceShape {
 			} else {
 				includePattern = include.pattern;
 				includeFolder = include.base;
+				// TODO use include.baseFolder;
 			}
 		}