diff --git a/src/Umbraco.Web/Install/HttpInstallAuthorizeAttribute.cs b/src/Umbraco.Web/Install/HttpInstallAuthorizeAttribute.cs
index 966b2d6c80..4cf844669f 100644
--- a/src/Umbraco.Web/Install/HttpInstallAuthorizeAttribute.cs
+++ b/src/Umbraco.Web/Install/HttpInstallAuthorizeAttribute.cs
@@ -27,7 +27,7 @@ namespace Umbraco.Web.Install
 
         private IRuntimeState RuntimeState => _runtimeState ?? Current.RuntimeState;
 
-        private UmbracoContext UmbracoContext => _umbracoContextAccessor.UmbracoContext ?? Current.UmbracoContext;
+        private UmbracoContext UmbracoContext => _umbracoContextAccessor?.UmbracoContext ?? Current.UmbracoContext;
 
         /// <summary>
         /// THIS SHOULD BE ONLY USED FOR UNIT TESTS