diff --git a/src/vs/workbench/parts/files/browser/views/explorerView.ts b/src/vs/workbench/parts/files/browser/views/explorerView.ts
index eb2239c2b3ac1fc0579df820a05e57e8e83e141e..c9680dc41f90a917228b922c5b8c0ed323e9cb16 100644
--- a/src/vs/workbench/parts/files/browser/views/explorerView.ts
+++ b/src/vs/workbench/parts/files/browser/views/explorerView.ts
@@ -161,7 +161,7 @@ export class ExplorerView extends ViewsViewletPanel {
 
 		const onFileIconThemeChange = (fileIconTheme: IFileIconTheme) => {
 			DOM.toggleClass(this.treeContainer, 'align-icons-and-twisties', fileIconTheme.hasFileIcons && !fileIconTheme.hasFolderIcons);
-			DOM.toggleClass(this.treeContainer, 'hide-arrows', fileIconTheme.hidesExplorerArrows);
+			DOM.toggleClass(this.treeContainer, 'hide-arrows', fileIconTheme.hidesExplorerArrows === true);
 		};
 
 		this.disposables.push(this.themeService.onDidFileIconThemeChange(onFileIconThemeChange));