diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 01fa343651..d549fa35e8 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -6154,13 +6154,14 @@ HeapObjectIterator::HeapObjectIterator(
       break;
   }
   object_iterator_ = space_iterator_->Next()->GetObjectIterator(heap_);
+  if (V8_ENABLE_THIRD_PARTY_HEAP_BOOL) heap_->tp_heap_->ResetIterator();
 }
 
 HeapObjectIterator::~HeapObjectIterator() {
 #ifdef DEBUG
   // Assert that in filtering mode we have iterated through all
   // objects. Otherwise, heap will be left in an inconsistent state.
-  if (filtering_ != kNoFiltering) {
+  if (!V8_ENABLE_THIRD_PARTY_HEAP_BOOL && filtering_ != kNoFiltering) {
     DCHECK_NULL(object_iterator_);
   }
 #endif
@@ -6177,6 +6178,7 @@ HeapObject HeapObjectIterator::Next() {
 }
 
 HeapObject HeapObjectIterator::NextObject() {
+  if (V8_ENABLE_THIRD_PARTY_HEAP_BOOL) return heap_->tp_heap_->NextObject();
   // No iterator means we are done.
   if (object_iterator_.get() == nullptr) return HeapObject();