diff --git a/src/vs/workbench/browser/workbench.ts b/src/vs/workbench/browser/workbench.ts
index cac1d06dff0a40b997d0d8a21135cd07720e02bb..2838b05e487083940c01b030deb4aab9764acebe 100644
--- a/src/vs/workbench/browser/workbench.ts
+++ b/src/vs/workbench/browser/workbench.ts
@@ -312,7 +312,7 @@ export class Workbench extends Layout {
 			'monaco-workbench',
 			platformClass,
 			isWeb ? 'web' : undefined,
-			isWeb ? isChrome ? 'chromium' : isFirefox ? 'firefox' : isSafari ? 'safari' : undefined : undefined,
+			isChrome ? 'chromium' : isFirefox ? 'firefox' : isSafari ? 'safari' : undefined,
 			...this.getLayoutClasses()
 		]);