diff --git a/www/js/plugins/GTP_OmoriFixes.js b/www/js/plugins/GTP_OmoriFixes.js
index c03b019..60c2bb9 100644
--- a/www/js/plugins/GTP_OmoriFixes.js
+++ b/www/js/plugins/GTP_OmoriFixes.js
@@ -1902,7 +1902,13 @@ Gamefall.OmoriFixes = Gamefall.OmoriFixes || {};
 				for (let obj of mainWindows) { obj.filters = []; }
 			}
 			else {
-				let hasToneFilter = objects[0].filters.length > 0;
+				let hasToneFilter;
+				if (objects[0].filters !== null) {
+					hasToneFilter = objects[0].filters.length > 0;
+				} else {
+					hasToneFilter = false;
+				}
+				
 				if (!hasToneFilter) {
 					for (let obj of mainWindows) { obj.filters = [this._spriteset.getToneFilter()]; }
 					this._usingToneFilter = true;