diff --git a/src/Umbraco.Core/Actions/ActionAssignDomain.cs b/src/Umbraco.Core/Actions/ActionAssignDomain.cs
index 0638f605af..452ca51549 100644
--- a/src/Umbraco.Core/Actions/ActionAssignDomain.cs
+++ b/src/Umbraco.Core/Actions/ActionAssignDomain.cs
@@ -17,7 +17,8 @@ public class ActionAssignDomain : IAction
     public char Letter => ActionLetter;
 
     /// <inheritdoc/>
-    public string Alias => "assignDomain";
+    // This is all lower-case because of case sensitive filesystems, see issue: https://github.com/umbraco/Umbraco-CMS/issues/11670
+    public string Alias => "assigndomain";
 
     /// <inheritdoc/>
     public string Category => Constants.Conventions.PermissionCategories.AdministrationCategory;