--- a/layout/base/RestyleManager.cpp
+++ b/layout/base/RestyleManager.cpp
@@ -1335,17 +1335,18 @@ RestyleManager::GetNextContinuationWithS
   }
 
   NS_ASSERTION(nextContinuation->GetContent() == aFrame->GetContent(),
                "unexpected content mismatch");
 
   nsStyleContext* nextStyle = nextContinuation->StyleContext();
   if (nextStyle != aOldStyleContext) {
     NS_ASSERTION(aOldStyleContext->GetPseudo() != nextStyle->GetPseudo() ||
-                 aOldStyleContext->GetParent() != nextStyle->GetParent(),
+                 aOldStyleContext->GetParentAllowServo() !=
+                   nextStyle->GetParentAllowServo(),
                  "continuations should have the same style context");
     nextContinuation = nullptr;
     if (aHaveMoreContinuations) {
       *aHaveMoreContinuations = true;
     }
   }
   return nextContinuation;
 }