diff --git a/src/hotspot/share/gc/serial/serialHeap.hpp b/src/hotspot/share/gc/serial/serialHeap.hpp
index 12a4261feec..fca877e2925 100644
--- a/src/hotspot/share/gc/serial/serialHeap.hpp
+++ b/src/hotspot/share/gc/serial/serialHeap.hpp
@@ -147,9 +147,6 @@ public:
   void post_initialize() override;
 
   bool is_young_gen(const Generation* gen) const { return gen == _young_gen; }
-  bool is_old_gen(const Generation* gen) const { return gen == _old_gen; }
-
-  MemRegion reserved_region() const { return _reserved; }
   bool is_in_reserved(const void* addr) const { return _reserved.contains(addr); }
 
   // Performance Counter support