diff --git a/.gitignore b/.gitignore
index a56a7ef..3017d0d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,4 @@
 node_modules
 
+/lib
+/yarn.lock
diff --git a/src/index.js b/src/index.js
index 1a9dbb8..bd3ded9 100644
--- a/src/index.js
+++ b/src/index.js
@@ -111,7 +111,7 @@ class YellowBox extends Component {
   }
 
   componentWillUnmount() {
-    if (this._listener) {
+    if (this._listener && typeof this._listener.remove === 'function') {
       this._listener.remove();
     }
   }