diff --git a/src/Interactable.js b/src/Interactable.js
index c48593b11..7f6d2d6b9 100644
--- a/src/Interactable.js
+++ b/src/Interactable.js
@@ -59,7 +59,7 @@ class Interactable {
         actionOptions[optionName] = arr.from(optionValue);
       }
       // if the option value is an object
-      else if (!isArray && is.object(optionValue)) {
+      else if (!isArray && is.plainObject(optionValue)) {
         // copy the object
         actionOptions[optionName] = extend(
           actionOptions[optionName] || {},
diff --git a/src/utils/clone.js b/src/utils/clone.js
index 4a4c80122..ce77da54d 100644
--- a/src/utils/clone.js
+++ b/src/utils/clone.js
@@ -3,7 +3,7 @@ const is = require('./is');
 module.exports = function clone (source) {
   const dest = {};
   for (const prop in source) {
-    if (is.object(source[prop])) {
+    if (is.plainObject(source[prop])) {
       dest[prop] = clone(source[prop]);
     } else {
       dest[prop] = source[prop];
diff --git a/src/utils/is.js b/src/utils/is.js
index a6f02ae34..c4ebbb878 100644
--- a/src/utils/is.js
+++ b/src/utils/is.js
@@ -27,6 +27,8 @@ const is = {
       ? thing instanceof _window.Element //DOM2
       : thing.nodeType === 1 && typeof thing.nodeName === 'string');
   },
+
+  plainObject: thing => is.object(thing) && thing.constructor.name === 'Object',
 };
 
 is.array = thing => (is.object(thing)