diff --git a/.babelrc b/.babelrc
index 41b27bc..45aec64 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,4 +1,4 @@
 {
-  "plugins": ["transform-decorators-legacy", "transform-runtime", "transform-es3-property-literals", "transform-es3-member-expression-literals"],
+  "plugins": ["transform-decorators-legacy", "transform-es3-property-literals", "transform-es3-member-expression-literals"],
   "presets": ["es2015-loose", "stage-0", "react"]
 }
diff --git a/package.json b/package.json
index 04aab68..1f169c1 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,6 @@
     "babel-plugin-transform-decorators-legacy": "^1.3.4",
     "babel-plugin-transform-es3-member-expression-literals": "^6.5.0",
     "babel-plugin-transform-es3-property-literals": "^6.5.0",
-    "babel-plugin-transform-runtime": "^6.7.5",
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-es2015-loose": "^7.0.0",
     "babel-preset-react": "^6.5.0",
@@ -65,7 +64,6 @@
     "react-dom": "^15.0.0"
   },
   "dependencies": {
-    "babel-runtime": "^6.6.1",
     "react-base16-styling": "^0.4.1",
     "react-pure-render": "^1.0.2"
   },
diff --git a/src/objType.js b/src/objType.js
index 123a4ac..fa64fb6 100644
--- a/src/objType.js
+++ b/src/objType.js
@@ -1,7 +1,9 @@
 export default function objType(obj) {
   const type = Object.prototype.toString.call(obj).slice(8, -1);
-  if (type === 'Object' && typeof obj[Symbol.iterator] === 'function') {
-    return 'Iterable';
+  if (type === 'Object') {
+    try {
+      if (typeof obj.forEach === 'function') return 'Iterable';
+    } catch (e) { /* Don't throw */ }
   }
 
   return type;
diff --git a/test/objType.spec.js b/test/objType.spec.js
new file mode 100644
index 0000000..70b19bf
--- /dev/null
+++ b/test/objType.spec.js
@@ -0,0 +1,23 @@
+import expect from 'expect';
+
+import objType from '../src/objType';
+
+describe('objType', () => {
+  it('should determine the correct type', () => {
+    expect(objType({})).toBe('Object');
+    expect(objType([])).toBe('Array');
+    expect(objType(new Map())).toBe('Map');
+    expect(objType(new WeakMap())).toBe('WeakMap');
+    expect(objType(new Set())).toBe('Set');
+    expect(objType(new WeakSet())).toBe('WeakSet');
+    expect(objType(new Error())).toBe('Error');
+    expect(objType(new Date())).toBe('Date');
+    expect(objType(() => {})).toBe('Function');
+    expect(objType('')).toBe('String');
+    expect(objType(true)).toBe('Boolean');
+    expect(objType(null)).toBe('Null');
+    expect(objType(undefined)).toBe('Undefined');
+    expect(objType(10)).toBe('Number');
+    expect(objType(Symbol.iterator)).toBe('Symbol');
+  });
+});