diff --git a/src/hotspot/share/gc/shenandoah/shenandoahAllocRate.hpp b/src/hotspot/share/gc/shenandoah/shenandoahAllocRate.hpp
index 4d75c5d6794..24221e504fd 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahAllocRate.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahAllocRate.hpp
@@ -25,6 +25,7 @@
 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHALLOCRATE_HPP
 #define SHARE_GC_SHENANDOAH_SHENANDOAHALLOCRATE_HPP
 
+#include "gc/shenandoah/shenandoahPadding.hpp"
 #include "gc/shenandoah/shenandoahWeightedSeq.hpp"
 #include "runtime/atomic.hpp"
 #include "runtime/mutex.hpp"
@@ -110,7 +111,9 @@ class ShenandoahAllocRate {
   static constexpr size_t ALLOC_SAMPLE_MAX = G;
 
   PaddedMonitor _sample_lock;
+  shenandoah_padding(0);
   Atomic<size_t> _allocated_bytes_since_last_sample;
+  shenandoah_padding(1);
   Atomic<size_t> _minimum_sample_size; // bytes, read by mutator, updated by gc
   jlong _last_sample_time;
 
diff --git a/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp b/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp
index f7f0a0ae0ba..43151af4c87 100644
--- a/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp
+++ b/src/hotspot/share/gc/shenandoah/shenandoahOldGeneration.hpp
@@ -29,6 +29,7 @@
 #include "gc/shenandoah/shenandoahAllocRequest.hpp"
 #include "gc/shenandoah/shenandoahGeneration.hpp"
 #include "gc/shenandoah/shenandoahGenerationalHeap.hpp"
+#include "gc/shenandoah/shenandoahPadding.hpp"
 #include "gc/shenandoah/shenandoahScanRemembered.hpp"
 #include "gc/shenandoah/shenandoahSharedVariables.hpp"
 
@@ -64,7 +65,9 @@ private:
   // is therefore always accessed through atomic operations. This is increased when a
   // PLAB is allocated for promotions. The value is decreased by the amount of memory
   // remaining in a PLAB when it is retired.
+  shenandoah_padding(0);
   Atomic<size_t> _promoted_expended;
+  shenandoah_padding(1);
 
   // Represents the quantity of live bytes we expect to promote during the next GC cycle, either by
   // evacuation or by promote-in-place.  This value is used by the young heuristic to trigger mixed collections.