diff --git a/src/core/display/Container.js b/src/core/display/Container.js
index 6a3612c..5399755 100644
--- a/src/core/display/Container.js
+++ b/src/core/display/Container.js
@@ -124,11 +124,6 @@
         const index1 = this.getChildIndex(child);
         const index2 = this.getChildIndex(child2);
 
-        if (index1 < 0 || index2 < 0)
-        {
-            throw new Error('swapChildren: Both the supplied DisplayObjects must be children of the caller.');
-        }
-
         this.children[index1] = child2;
         this.children[index2] = child;
         this.onChildrenChange(index1 < index2 ? index1 : index2);