diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fdd3172..d6025b0e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
+## [UNRELEASED]
+
+### Fixed
+
+- Fix - Ensure selected states is always an array in inventory selector
+
 ## [1.9.6] - 2026-05-22
 
 ### Fixed
diff --git a/inc/inventory.class.php b/inc/inventory.class.php
index 63efcbb4..de30da4d 100644
--- a/inc/inventory.class.php
+++ b/inc/inventory.class.php
@@ -45,6 +45,9 @@ public static function selectorForMultipleStates($field, $condition = [], $label
         $selected_states = [];
         if (isset($_SESSION['mreporting_values'][$field])) {
             $selected_states = $_SESSION['mreporting_values'][$field];
+            if (!is_array($selected_states)) {
+                $selected_states = [];
+            }
         } else {
             $selected_states = self::getDefaultState();
         }