diff --git a/core/um-members.php b/core/um-members.php
index 512f12b8..94e5790a 100644
--- a/core/um-members.php
+++ b/core/um-members.php
@@ -177,7 +177,7 @@ class UM_Members {
 		
 		$users = new WP_User_Query( $query_args );
 		
-		$array['users'] = array_unique( $users->results );
+		$array['users'] = isset( $users->results ) && ! empty( $users->results ) ? array_unique( $users->results ) : array();
 
 		$array['total_users'] = (isset( $max_users ) && $max_users && $max_users <= $users->total_users ) ? $max_users : $users->total_users;