diff --git a/src/hotspot/share/oops/instanceKlass.hpp b/src/hotspot/share/oops/instanceKlass.hpp
index f207d4b7728..aac519f3576 100644
--- a/src/hotspot/share/oops/instanceKlass.hpp
+++ b/src/hotspot/share/oops/instanceKlass.hpp
@@ -1195,7 +1195,7 @@ public:
 
   // Iterate over all oop fields and metadata.
   template <typename T, class OopClosureType>
-  inline int oop_oop_iterate(oop obj, OopClosureType* closure);
+  inline void oop_oop_iterate(oop obj, OopClosureType* closure);
 
   // Iterate over all oop fields in one oop map.
   template <typename T, class OopClosureType>
@@ -1205,7 +1205,7 @@ public:
   // Reverse iteration
   // Iterate over all oop fields and metadata.
   template <typename T, class OopClosureType>
-  inline int oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
+  inline void oop_oop_iterate_reverse(oop obj, OopClosureType* closure);
 
  private:
   // Iterate over all oop fields in the oop maps.
@@ -1225,7 +1225,7 @@ public:
 
   // Iterate over all oop fields and metadata.
   template <typename T, class OopClosureType>
-  inline int oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
+  inline void oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr);
 
  private:
   // Iterate over all oop fields in one oop map.
diff --git a/src/hotspot/share/oops/instanceKlass.inline.hpp b/src/hotspot/share/oops/instanceKlass.inline.hpp
index 7a9223daeb9..771ae9a9494 100644
--- a/src/hotspot/share/oops/instanceKlass.inline.hpp
+++ b/src/hotspot/share/oops/instanceKlass.inline.hpp
@@ -130,28 +130,24 @@ ALWAYSINLINE void InstanceKlass::oop_oop_iterate_oop_maps_bounded(oop obj, OopCl
 }
 
 template <typename T, class OopClosureType>
-ALWAYSINLINE int InstanceKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
+ALWAYSINLINE void InstanceKlass::oop_oop_iterate(oop obj, OopClosureType* closure) {
   if (Devirtualizer::do_metadata(closure)) {
     Devirtualizer::do_klass(closure, this);
   }
 
   oop_oop_iterate_oop_maps<T>(obj, closure);
-
-  return size_helper();
 }
 
 template <typename T, class OopClosureType>
-ALWAYSINLINE int InstanceKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
+ALWAYSINLINE void InstanceKlass::oop_oop_iterate_reverse(oop obj, OopClosureType* closure) {
   assert(!Devirtualizer::do_metadata(closure),
       "Code to handle metadata is not implemented");
 
   oop_oop_iterate_oop_maps_reverse<T>(obj, closure);
-
-  return size_helper();
 }
 
 template <typename T, class OopClosureType>
-ALWAYSINLINE int InstanceKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
+ALWAYSINLINE void InstanceKlass::oop_oop_iterate_bounded(oop obj, OopClosureType* closure, MemRegion mr) {
   if (Devirtualizer::do_metadata(closure)) {
     if (mr.contains(obj)) {
       Devirtualizer::do_klass(closure, this);
@@ -159,8 +155,6 @@ ALWAYSINLINE int InstanceKlass::oop_oop_iterate_bounded(oop obj, OopClosureType*
   }
 
   oop_oop_iterate_oop_maps_bounded<T>(obj, closure, mr);
-
-  return size_helper();
 }
 
 #endif // SHARE_VM_OOPS_INSTANCEKLASS_INLINE_HPP