diff --git a/src/ViewModels/ExportCollectionViewModel.cs b/src/ViewModels/ExportCollectionViewModel.cs
index 321c4bdd..d7ed2f19 100644
--- a/src/ViewModels/ExportCollectionViewModel.cs
+++ b/src/ViewModels/ExportCollectionViewModel.cs
@@ -47,7 +47,7 @@ public bool AdvancedExport
             }
         }
 
-        private ActionCommand _applyActiveFiltesCommand;
+        private ActionCommand? _applyActiveFiltesCommand;
         public ActionCommand ApplyActiveFiltersCommand => _applyActiveFiltesCommand ??=
             new(ApplyActiveFilters, () => MainViewModel.CollectionVM.FilterVM.HasActiveFilters);
         private void ApplyActiveFilters()