diff --git a/src/vs/workbench/parts/files/electron-browser/fileActions.contribution.ts b/src/vs/workbench/parts/files/electron-browser/fileActions.contribution.ts
index a22793975155e86dfa12bd8393c2c19b3d64b9dd..fcc0f1e4c844b5ef77bb0d4dc9a65ad5ad6ac138 100644
--- a/src/vs/workbench/parts/files/electron-browser/fileActions.contribution.ts
+++ b/src/vs/workbench/parts/files/electron-browser/fileActions.contribution.ts
@@ -175,7 +175,7 @@ MenuRegistry.appendMenuItem(MenuId.OpenEditorsContext, {
 	group: 'navigation',
 	order: 10,
 	command: openToSideCommand,
-	when: ResourceContextKey.HasResource && ResourceContextKey.IsFile
+	when: ContextKeyExpr.and(ResourceContextKey.HasResource, ResourceContextKey.IsFile)
 });
 
 const revealInOsCommand = {