diff --git a/src/vs/workbench/browser/parts/activitybar/activitybarPart.ts b/src/vs/workbench/browser/parts/activitybar/activitybarPart.ts
index fdfb3f17dac..87c2500332b 100644
--- a/src/vs/workbench/browser/parts/activitybar/activitybarPart.ts
+++ b/src/vs/workbench/browser/parts/activitybar/activitybarPart.ts
@@ -204,7 +204,6 @@ export class ActivitybarPart extends Part implements IActivityBarService {
 	private getActivityHoverOptions(): IActivityHoverOptions {
 		return {
 			position: () => this.layoutService.getSideBarPosition() === Position.LEFT ? HoverPosition.RIGHT : HoverPosition.LEFT,
-			delay: () => 0
 		};
 	}
 
diff --git a/src/vs/workbench/browser/parts/panel/panelPart.ts b/src/vs/workbench/browser/parts/panel/panelPart.ts
index 49a9fdd7a31..bd1eedd97b2 100644
--- a/src/vs/workbench/browser/parts/panel/panelPart.ts
+++ b/src/vs/workbench/browser/parts/panel/panelPart.ts
@@ -151,7 +151,6 @@ export class PanelPart extends CompositePart<Panel> implements IPanelService {
 			orientation: ActionsOrientation.HORIZONTAL,
 			activityHoverOptions: {
 				position: () => this.layoutService.getPanelPosition() === Position.BOTTOM && !this.layoutService.isPanelMaximized() ? HoverPosition.ABOVE : HoverPosition.BELOW,
-				delay: () => 0
 			},
 			openComposite: compositeId => this.openPanel(compositeId, true).then(panel => panel || null),
 			getActivityAction: compositeId => this.getCompositeActions(compositeId).activityAction,