diff --git a/src/hotspot/share/gc/g1/g1FullCollector.cpp b/src/hotspot/share/gc/g1/g1FullCollector.cpp
index 7395df01760..6c8cc7028cc 100644
--- a/src/hotspot/share/gc/g1/g1FullCollector.cpp
+++ b/src/hotspot/share/gc/g1/g1FullCollector.cpp
@@ -134,10 +134,10 @@ G1FullCollector::G1FullCollector(G1CollectedHeap* heap,
   _compaction_points = NEW_C_HEAP_ARRAY(G1FullGCCompactionPoint*, _num_workers, mtGC);
 
   _live_stats = NEW_C_HEAP_ARRAY(G1RegionMarkStats, _heap->max_num_regions(), mtGC);
-  _compaction_tops = NEW_C_HEAP_ARRAY(HeapWord*, _heap->max_num_regions(), mtGC);
+  _compaction_tops = NEW_C_HEAP_ARRAY(Atomic<HeapWord*>, _heap->max_num_regions(), mtGC);
   for (uint j = 0; j < heap->max_num_regions(); j++) {
     _live_stats[j].clear();
-    _compaction_tops[j] = nullptr;
+    ::new (&_compaction_tops[j]) Atomic<HeapWord*>{};
   }
 
   _partial_array_state_manager = new PartialArrayStateManager(_num_workers);
@@ -167,7 +167,7 @@ G1FullCollector::~G1FullCollector() {
 
   FREE_C_HEAP_ARRAY(G1FullGCMarker*, _markers);
   FREE_C_HEAP_ARRAY(G1FullGCCompactionPoint*, _compaction_points);
-  FREE_C_HEAP_ARRAY(HeapWord*, _compaction_tops);
+  FREE_C_HEAP_ARRAY(Atomic<HeapWord*>, _compaction_tops);
   FREE_C_HEAP_ARRAY(G1RegionMarkStats, _live_stats);
 }
 
diff --git a/src/hotspot/share/gc/g1/g1FullCollector.hpp b/src/hotspot/share/gc/g1/g1FullCollector.hpp
index 28ecffad944..7e455b07013 100644
--- a/src/hotspot/share/gc/g1/g1FullCollector.hpp
+++ b/src/hotspot/share/gc/g1/g1FullCollector.hpp
@@ -96,7 +96,7 @@ class G1FullCollector : StackObj {
 
   G1FullGCHeapRegionAttr _region_attr_table;
 
-  HeapWord* volatile* _compaction_tops;
+  Atomic<HeapWord*>* _compaction_tops;
 
 public:
   G1FullCollector(G1CollectedHeap* heap,
diff --git a/src/hotspot/share/gc/g1/g1FullCollector.inline.hpp b/src/hotspot/share/gc/g1/g1FullCollector.inline.hpp
index b52f3d79604..0c201f0e43f 100644
--- a/src/hotspot/share/gc/g1/g1FullCollector.inline.hpp
+++ b/src/hotspot/share/gc/g1/g1FullCollector.inline.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2020, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -63,11 +63,11 @@ void G1FullCollector::update_from_skip_compacting_to_compacting(uint region_idx)
 }
 
 void G1FullCollector::set_compaction_top(G1HeapRegion* r, HeapWord* value) {
-  AtomicAccess::store(&_compaction_tops[r->hrm_index()], value);
+  _compaction_tops[r->hrm_index()].store_relaxed(value);
 }
 
 HeapWord* G1FullCollector::compaction_top(G1HeapRegion* r) const {
-  return AtomicAccess::load(&_compaction_tops[r->hrm_index()]);
+  return _compaction_tops[r->hrm_index()].load_relaxed();
 }
 
 void G1FullCollector::set_has_compaction_targets() {