diff --git a/src/vs/workbench/parts/debug/common/debug.ts b/src/vs/workbench/parts/debug/common/debug.ts
index 454433434e5f4f09a22728d51356ea1c87718717..3ecae97d4035b666d3207bcebb4585cfa6ddc41c 100644
--- a/src/vs/workbench/parts/debug/common/debug.ts
+++ b/src/vs/workbench/parts/debug/common/debug.ts
@@ -9,6 +9,8 @@ import Event from 'vs/base/common/event';
 import severity from 'vs/base/common/severity';
 import {createDecorator} from 'vs/platform/instantiation/common/instantiation';
 import editor = require('vs/editor/common/editorCommon');
+import {Position} from 'vs/editor/common/core/position';
+import {ISuggestion} from 'vs/editor/common/modes';
 import {Source} from 'vs/workbench/parts/debug/common/debugSource';
 import {Range} from 'vs/editor/common/core/range';
 import {RawContextKey, ContextKeyExpr} from 'vs/platform/contextkey/common/contextkey';
@@ -19,6 +21,7 @@ export const DEBUG_SERVICE_ID = 'debugService';
 export const CONTEXT_IN_DEBUG_MODE = new RawContextKey<boolean>('inDebugMode', false);
 export const CONTEXT_NOT_IN_DEBUG_MODE:ContextKeyExpr = CONTEXT_IN_DEBUG_MODE.toNegated();
 export const EDITOR_CONTRIBUTION_ID = 'editor.contrib.debug';
+export const DEBUG_SCHEME = 'debug';
 
 // raw
 
@@ -414,6 +417,7 @@ export interface IDebugService {
 	continue(threadId: number): TPromise<void>;
 	pause(threadId: number): TPromise<any>;
 	restartFrame(frameId: number): TPromise<any>;
+	completions(text: string, position: Position): TPromise<ISuggestion[]>;
 }
 
 // Editor interfaces
diff --git a/src/vs/workbench/parts/debug/common/debugSource.ts b/src/vs/workbench/parts/debug/common/debugSource.ts
index 974b5bf229d7930d8e3986dea8f451b34dbcf81a..ad440c30612900c37c85a620e6a44877aa8d852a 100644
--- a/src/vs/workbench/parts/debug/common/debugSource.ts
+++ b/src/vs/workbench/parts/debug/common/debugSource.ts
@@ -5,14 +5,14 @@
 
 import uri from 'vs/base/common/uri';
 import paths = require('vs/base/common/paths');
-import {IModel} from 'vs/workbench/parts/debug/common/debug';
+import {IModel, DEBUG_SCHEME} from 'vs/workbench/parts/debug/common/debug';
 
 export class Source {
 
 	public uri: uri;
 	public available: boolean;
 
-	private static INTERNAL_URI_PREFIX = 'debug://internal/';
+	private static INTERNAL_URI_PREFIX = `${DEBUG_SCHEME}://internal/`;
 
 	constructor(public raw: DebugProtocol.Source, available = true) {
 		this.uri = raw.path ? uri.file(paths.normalize(raw.path)) : uri.parse(Source.INTERNAL_URI_PREFIX + raw.name);
diff --git a/src/vs/workbench/parts/debug/electron-browser/debugService.ts b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
index f1bf9a18995ba8f2ec40b076c2227e396d938f46..7e1e42fc831f6973083e343e936b440dd0132d04 100644
--- a/src/vs/workbench/parts/debug/electron-browser/debugService.ts
+++ b/src/vs/workbench/parts/debug/electron-browser/debugService.ts
@@ -17,6 +17,8 @@ import severity from 'vs/base/common/severity';
 import {TPromise} from 'vs/base/common/winjs.base';
 import aria = require('vs/base/browser/ui/aria/aria');
 import editorbrowser = require('vs/editor/browser/editorBrowser');
+import {ISuggestion} from 'vs/editor/common/modes';
+import {Position} from 'vs/editor/common/core/position';
 import {IContextKeyService, IContextKey} from 'vs/platform/contextkey/common/contextkey';
 import {IMarkerService} from 'vs/platform/markers/common/markers';
 import {ILifecycleService} from 'vs/platform/lifecycle/common/lifecycle';
@@ -947,6 +949,23 @@ export class DebugService implements debug.IDebugService {
 		return this.session.restartFrame({ frameId });
 	}
 
+	public completions(text: string, position: Position): TPromise<ISuggestion[]> {
+		if (!this.session) {
+			return TPromise.as([]);
+		}
+
+		return this.session.completions({
+			frameId: this.viewModel.getFocusedStackFrame().frameId,
+			text,
+			column: position.column,
+			line: position.lineNumber
+		}).then(response => response.body.targets.map(item => ({
+			label: item.label,
+			insertText: item.text || item.label,
+			type: 'property'
+		})), err => []);
+	}
+
 	private lazyTransitionToRunningState(threadId?: number): void {
 		let setNewFocusedStackFrameScheduler: RunOnceScheduler;
 
diff --git a/src/vs/workbench/parts/debug/electron-browser/rawDebugSession.ts b/src/vs/workbench/parts/debug/electron-browser/rawDebugSession.ts
index b5a2505a1a1940c8aba1e5122b9fed4e2e165e55..bfb0bb61b69b6d9760fcf4c5e4da596185325fda 100644
--- a/src/vs/workbench/parts/debug/electron-browser/rawDebugSession.ts
+++ b/src/vs/workbench/parts/debug/electron-browser/rawDebugSession.ts
@@ -274,6 +274,10 @@ export class RawDebugSession extends v8.V8Protocol implements debug.IRawDebugSes
 		return this.send('restartFrame', args);
 	}
 
+	public completions(args: DebugProtocol.CompletionsArguments): TPromise<DebugProtocol.CompletionsResponse> {
+		return this.send('completions', args);
+	}
+
 	public disconnect(restart = false, force = false): TPromise<DebugProtocol.DisconnectResponse> {
 		if (this.stopServerPending && force) {
 			return this.stopServer();
diff --git a/src/vs/workbench/parts/debug/test/common/mockDebugService.ts b/src/vs/workbench/parts/debug/test/common/mockDebugService.ts
index d36b4cd86b53871d92cb8c5d760a37b13747e8bf..5f02269972bec09399954b5075caa762c74a33ba 100644
--- a/src/vs/workbench/parts/debug/test/common/mockDebugService.ts
+++ b/src/vs/workbench/parts/debug/test/common/mockDebugService.ts
@@ -6,6 +6,8 @@
 import Event from 'vs/base/common/event';
 import severity from 'vs/base/common/severity';
 import {TPromise} from 'vs/base/common/winjs.base';
+import {ISuggestion} from 'vs/editor/common/modes';
+import {Position} from 'vs/editor/common/core/position';
 import debug = require('vs/workbench/parts/debug/common/debug');
 import {Source} from 'vs/workbench/parts/debug/common/debugSource';
 
@@ -134,6 +136,10 @@ export class MockDebugService implements debug.IDebugService {
 	public restartFrame(frameId: number): TPromise<any> {
 		return TPromise.as(null);
 	}
+
+	public completions(text: string, position: Position): TPromise<ISuggestion[]> {
+		return TPromise.as([]);
+	}
 }