diff --git a/src/vs/workbench/contrib/webview/common/themeing.ts b/src/vs/workbench/contrib/webview/common/themeing.ts
index 42c6801ebc6cd5108883914e99946d8c370b6298..f1ac357f34d2f69d96580a1173ff11297108645f 100644
--- a/src/vs/workbench/contrib/webview/common/themeing.ts
+++ b/src/vs/workbench/contrib/webview/common/themeing.ts
@@ -66,12 +66,10 @@ enum ApiThemeClassName {
 
 namespace ApiThemeClassName {
 	export function fromTheme(theme: ITheme): ApiThemeClassName {
-		if (theme.type === LIGHT) {
-			return ApiThemeClassName.light;
-		} else if (theme.type === DARK) {
-			return ApiThemeClassName.dark;
-		} else {
-			return ApiThemeClassName.highContrast;
+		switch (theme.type) {
+			case LIGHT: return ApiThemeClassName.light;
+			case DARK: return ApiThemeClassName.dark;
+			default: return ApiThemeClassName.highContrast;
 		}
 	}
 }