diff --git a/pkg/cmd/diff/diff.go b/pkg/cmd/diff/diff.go
index 16e74ef8c..d33e95cf9 100644
--- a/pkg/cmd/diff/diff.go
+++ b/pkg/cmd/diff/diff.go
@@ -659,7 +659,7 @@ func (o *DiffOptions) Complete(f cmdutil.Factory, cmd *cobra.Command, args []str
 		if err != nil {
 			return err
 		}
-		o.pruner = newPruner(o.DynamicClient, mapper, resources)
+		o.pruner = newPruner(o.DynamicClient, mapper, resources, o.Selector)
 	}
 
 	o.Builder = f.NewBuilder()
diff --git a/pkg/cmd/diff/prune.go b/pkg/cmd/diff/prune.go
index ffb37a2e5..ef77fac89 100644
--- a/pkg/cmd/diff/prune.go
+++ b/pkg/cmd/diff/prune.go
@@ -40,13 +40,14 @@ type pruner struct {
 	resources         []prune.Resource
 }
 
-func newPruner(dc dynamic.Interface, m meta.RESTMapper, r []prune.Resource) *pruner {
+func newPruner(dc dynamic.Interface, m meta.RESTMapper, r []prune.Resource, selector string) *pruner {
 	return &pruner{
 		visitedUids:       sets.NewString(),
 		visitedNamespaces: sets.NewString(),
 		dynamicClient:     dc,
 		mapper:            m,
 		resources:         r,
+		labelSelector:     selector,
 	}
 }