--- a/content/base/src/nsContentUtils.cpp
+++ b/content/base/src/nsContentUtils.cpp
@@ -6818,17 +6818,17 @@ nsContentUtils::HasDistributedChildren(n
     // the shadow insertion point of the younger shadow root.
     return shadow->GetYoungerShadow();
   }
 
   HTMLShadowElement* shadowEl = HTMLShadowElement::FromContent(aContent);
   if (shadowEl && shadowEl->IsInsertionPoint()) {
     // Children of a shadow insertion points are distributed
     // to the insertion points in the older shadow root.
-    return shadow->GetOlderShadow();
+    return shadowEl->GetOlderShadowRoot();
   }
 
   HTMLContentElement* contentEl = HTMLContentElement::FromContent(aContent);
   if (contentEl && contentEl->IsInsertionPoint()) {
     // Children of a content insertion point are distributed to the
     // content insertion point if the content insertion point does
     // not match any nodes (fallback content).
     return contentEl->MatchedNodes().IsEmpty();