diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index 3e235b780fabb..3e402ebc8843a 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -721,7 +721,7 @@ function get_taxonomy_labels( $tax ) {
 
 	$labels = _get_custom_object_labels( $tax, $nohier_vs_hier_defaults );
 
-	if ( ! isset( $tax->labels->template_name ) && isset( $labels->singular_name ) ) {
+	if ( ! isset( $tax->labels['template_name'] ) && isset( $labels->singular_name ) ) {
 		/* translators: %s: Taxonomy name. */
 		$labels->template_name = sprintf( _x( '%s Archives', 'taxonomy template name' ), $labels->singular_name );
 	}