diff --git a/lib/WebComponent.js b/lib/WebComponent.js
index 49dcead..fecae0c 100644
--- a/lib/WebComponent.js
+++ b/lib/WebComponent.js
@@ -110,7 +110,11 @@ export class CustomElement extends HTMLElement {
     }
 
     disconnectedCallback() {
-		ReactDOM.unmountComponentAtNode(_rootShadows.get(this));
+        const rootEl = _rootShadows.get(this);
+        if(rootEl) {
+            ReactDOM.unmountComponentAtNode(_rootShadows.get(this));
+        }
+
 		if (this.rootDiv) {
 			this.removeChild(this.rootDiv);
 			delete this.rootDiv;