diff --git a/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts b/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts
index 8873d4ed56f65921079624270c01c7238e3212d7..eb4fa87e224dd0aab79855046411f4afb4a6476a 100644
--- a/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts
+++ b/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts
@@ -234,8 +234,10 @@ export class TitlebarPart extends Part implements ITitleService {
 
 		// Part container
 		const container = this.getContainer();
-		container.style('color', this.getColor(this.isInactive ? TITLE_BAR_INACTIVE_FOREGROUND : TITLE_BAR_ACTIVE_FOREGROUND));
-		container.style('background-color', this.getColor(this.isInactive ? TITLE_BAR_INACTIVE_BACKGROUND : TITLE_BAR_ACTIVE_BACKGROUND));
+		if (container) {
+			container.style('color', this.getColor(this.isInactive ? TITLE_BAR_INACTIVE_FOREGROUND : TITLE_BAR_ACTIVE_FOREGROUND));
+			container.style('background-color', this.getColor(this.isInactive ? TITLE_BAR_INACTIVE_BACKGROUND : TITLE_BAR_ACTIVE_BACKGROUND));
+		}
 	}
 
 	private onTitleDoubleclick(): void {