diff --git a/wp-includes/taxonomy.php b/wp-includes/taxonomy.php
index 7ff488fca..dcc0d3420 100644
--- a/wp-includes/taxonomy.php
+++ b/wp-includes/taxonomy.php
@@ -1057,14 +1057,14 @@ function wp_get_object_terms($object_ids, $taxonomies, $args = array()) {
 	if ( count($taxonomies) > 1 ) {
 		foreach ( $taxonomies as $index => $taxonomy ) {
 			$t = get_taxonomy($taxonomy);
-			if ( is_array($t->args) && $args != array_merge($args, $t->args) ) {
+			if ( isset($t->args) && is_array($t->args) && $args != array_merge($args, $t->args) ) {
 				unset($taxonomies[$index]);
 				$terms = array_merge($terms, wp_get_object_terms($object_ids, $taxonomy, array_merge($args, $t->args)));
 			}
 		}
 	} else {
 		$t = get_taxonomy($taxonomies[0]);
-		if ( is_array($t->args) )
+		if ( isset($t->args) && is_array($t->args) )
 			$args = array_merge($args, $t->args);
 	}