2 files changed, 3 insertions, 3 deletions
diff --git a/gc.c b/gc.c
index 451af7cc6f..42de20060b 100644
--- a/gc.c
+++ b/gc.c
@@ -3489,7 +3489,7 @@ obj_free(rb_objspace_t *objspace, VALUE obj)
             xfree(RCLASS_SUPERCLASSES(obj));
         }
 
-#if SIZE_POOL_COUNT == 1
+#if !RCLASS_EXT_EMBEDDED
         if (RCLASS_EXT(obj))
             xfree(RCLASS_EXT(obj));
 #endif
@@ -4908,7 +4908,7 @@ obj_memsize_of(VALUE obj, int use_all_types)
             if (FL_TEST_RAW(obj, RCLASS_SUPERCLASSES_INCLUDE_SELF)) {
                 size += (RCLASS_SUPERCLASS_DEPTH(obj) + 1) * sizeof(VALUE);
             }
-#if SIZE_POOL_COUNT == 1
+#if !RCLASS_EXT_EMBEDDED
             size += sizeof(rb_classext_t);
 #endif
         }
diff --git a/internal/class.h b/internal/class.h
index bdc3bdd236..02a2e38ffe 100644
--- a/internal/class.h
+++ b/internal/class.h
@@ -69,7 +69,7 @@ struct RClass {
     struct RBasic basic;
     VALUE super;
     struct rb_id_table *m_tbl;
-#if SIZE_POOL_COUNT == 1
+#if !RCLASS_EXT_EMBEDDED
     struct rb_classext_struct *ptr;
 #endif
 };