diff --git a/src/module/module-collection.js b/src/module/module-collection.js
index a68f05a51..30bc97522 100644
--- a/src/module/module-collection.js
+++ b/src/module/module-collection.js
@@ -49,7 +49,7 @@ export default class ModuleCollection {
   unregister (path) {
     const parent = this.get(path.slice(0, -1))
     const key = path[path.length - 1]
-    if (!parent.getChild(key).runtime) return
+    if (!parent.getChild(key) || !parent.getChild(key).runtime) return
 
     parent.removeChild(key)
   }