diff --git a/src/js/utilJS.js b/src/js/utilJS.js
index 5de5fe3d111ae8dc264c9bfabc2b1e1b6d010081..93680f7781a82bc1c4949f8570e171105c8092da 100644
--- a/src/js/utilJS.js
+++ b/src/js/utilJS.js
@@ -939,7 +939,7 @@ window.Categorizer.prototype.cat = function(val, def) {
 	}
 	// Record the value for the result's getter, if it is an object
 	// and doesn't have the property yet
-	if (result === _.isObject(result)) {
+	if (result === Object.isObject(result)) {
 		result.value = val;
 	}
 	return result;