diff --git a/src/util/util.js b/src/util/util.js
index b405315886b8a273a5b7d9c7fc04cb3b24ef4705..75c94bdf3fe37da1ba3567b9ff87035cb2bd3023 100644
--- a/src/util/util.js
+++ b/src/util/util.js
@@ -1318,7 +1318,7 @@ morpheus.Util.ExactTermPredicate = function (field, term) {
 };
 morpheus.Util.ExactTermPredicate.prototype = {
 	accept: function (value) {
-		return value.toLowerCase && value.toLowerCase() === this.text;
+		return value && value.toLowerCase && value.toLowerCase() === this.text;
 	},
 	getField: function () {
 		return this.field;