diff --git a/backend/union/union.go b/backend/union/union.go
index f1922eda7..687a8496c 100644
--- a/backend/union/union.go
+++ b/backend/union/union.go
@@ -1020,6 +1020,9 @@ func NewFs(ctx context.Context, name, root string, m configmap.Mapper) (fs.Fs, e
 		}
 	}
 
+	// Disable ListP always
+	features.ListP = nil
+
 	// show that we wrap other backends
 	features.Overlay = true
 
diff --git a/backend/union/union_test.go b/backend/union/union_test.go
index b9f4e24e2..48ab82052 100644
--- a/backend/union/union_test.go
+++ b/backend/union/union_test.go
@@ -12,7 +12,7 @@ import (
 )
 
 var (
-	unimplementableFsMethods     = []string{"UnWrap", "WrapFs", "SetWrapper", "UserInfo", "Disconnect", "PublicLink", "PutUnchecked", "MergeDirs", "OpenWriterAt", "OpenChunkWriter"}
+	unimplementableFsMethods     = []string{"UnWrap", "WrapFs", "SetWrapper", "UserInfo", "Disconnect", "PublicLink", "PutUnchecked", "MergeDirs", "OpenWriterAt", "OpenChunkWriter", "ListP"}
 	unimplementableObjectMethods = []string{}
 )