1 files changed, 0 insertions, 1 deletions
diff --git a/gc.c b/gc.c
index 4124d8e42d..13cf3990a0 100644
--- a/gc.c
+++ b/gc.c
@@ -615,7 +615,6 @@ rb_gc_guarded_ptr_val(volatile VALUE *ptr, VALUE val)
 #endif
 
 static const char *obj_type_name(VALUE obj);
-#define RB_AMALGAMATED_DEFAULT_GC
 #include "gc/default/default.c"
 
 #if USE_SHARED_GC && !defined(HAVE_DLOPEN)