diff --git a/src/vs/workbench/browser/contextkeys.ts b/src/vs/workbench/browser/contextkeys.ts
index 9b733922701d4c2523a6063646081e60bb3f3157..44c72c35c199fdfbbeff48435d33dfd88c27b59c 100644
--- a/src/vs/workbench/browser/contextkeys.ts
+++ b/src/vs/workbench/browser/contextkeys.ts
@@ -16,7 +16,7 @@ import { IConfigurationService } from 'vs/platform/configuration/common/configur
 import { IEnvironmentService } from 'vs/platform/environment/common/environment';
 import { IEditorService } from 'vs/workbench/services/editor/common/editorService';
 import { WorkbenchState, IWorkspaceContextService } from 'vs/platform/workspace/common/workspace';
-import { SidebarVisibleContext, SideBarVisibleContext } from 'vs/workbench/common/viewlet';
+import { SideBarVisibleContext } from 'vs/workbench/common/viewlet';
 import { IWorkbenchLayoutService, Parts } from 'vs/workbench/services/layout/browser/layoutService';
 import { IViewletService } from 'vs/workbench/services/viewlet/browser/viewlet';
 
@@ -38,8 +38,6 @@ export class WorkbenchContextKeysHandler extends Disposable {
 	private inZenModeContext: IContextKey<boolean>;
 
 	private sideBarVisibleContext: IContextKey<boolean>;
-	//TODO@Isidor remove in May
-	private sidebarVisibleContext: IContextKey<boolean>;
 
 	constructor(
 		@IContextKeyService private contextKeyService: IContextKeyService,
@@ -131,7 +129,6 @@ export class WorkbenchContextKeysHandler extends Disposable {
 
 		// Sidebar
 		this.sideBarVisibleContext = SideBarVisibleContext.bindTo(this.contextKeyService);
-		this.sidebarVisibleContext = SidebarVisibleContext.bindTo(this.contextKeyService);
 	}
 
 	private updateEditorContextKeys(): void {
@@ -208,6 +205,5 @@ export class WorkbenchContextKeysHandler extends Disposable {
 
 	private updateSideBarContextKeys(): void {
 		this.sideBarVisibleContext.set(this.layoutService.isVisible(Parts.SIDEBAR_PART));
-		this.sidebarVisibleContext.set(this.layoutService.isVisible(Parts.SIDEBAR_PART));
 	}
 }
\ No newline at end of file
diff --git a/src/vs/workbench/common/viewlet.ts b/src/vs/workbench/common/viewlet.ts
index 09836ae5e8aa9cb48cc2d8c5a9d6c4a1127efd5f..ddb8340130cbe041956c0b2827e8f37f9b8b3483 100644
--- a/src/vs/workbench/common/viewlet.ts
+++ b/src/vs/workbench/common/viewlet.ts
@@ -6,7 +6,6 @@
 import { IComposite } from 'vs/workbench/common/composite';
 import { RawContextKey } from 'vs/platform/contextkey/common/contextkey';
 
-export const SidebarVisibleContext = new RawContextKey<boolean>('sidebarVisible', false);
 export const SideBarVisibleContext = new RawContextKey<boolean>('sideBarVisible', false);
 export const SidebarFocusContext = new RawContextKey<boolean>('sideBarFocus', false);
 export const ActiveViewletContext = new RawContextKey<string>('activeViewlet', '');