1 files changed, 6 insertions, 0 deletions
diff --git a/internal.h b/internal.h
index 963192d27b..289561306b 100644
--- a/internal.h
+++ b/internal.h
@@ -439,9 +439,15 @@ void rb_objspace_set_event_hook(const rb_event_flag_t event);
 void rb_gc_writebarrier_remember_promoted(VALUE obj);
 void ruby_gc_set_params(void);
 
+#if HAVE_MALLOC_USABLE_SIZE || defined(_WIN32)
+#define ruby_sized_xrealloc(ptr, new_size, old_size) ruby_xrealloc(ptr, new_size)
+#define ruby_sized_xfree(ptr, size) ruby_xfree(ptr)
+#define SIZED_REALLOC_N(var,type,n,old_n) REALLOC_N(var, type, n)
+#else
 void *ruby_sized_xrealloc(void *ptr, size_t new_size, size_t old_size) RUBY_ATTR_ALLOC_SIZE((2));
 void ruby_sized_xfree(void *x, size_t size);
 #define SIZED_REALLOC_N(var,type,n,old_n) ((var)=(type*)ruby_sized_xrealloc((char*)(var), (n) * sizeof(type), (old_n) * sizeof(type)))
+#endif
 
 void rb_gc_resurrect(VALUE ptr);