diff --git a/gc.c b/gc.c
index 7dee915fab..9d314c7416 100644
--- a/gc.c
+++ b/gc.c
@@ -288,6 +288,7 @@ rb_gc_run_obj_finalizer(VALUE objid, long count, VALUE (*callback)(long i, void
     saved.finished = 0;
     saved.final = Qundef;
 
+    rb_ractor_ignore_belonging(true);
     EC_PUSH_TAG(ec);
     enum ruby_tag_type state = EC_EXEC_TAG();
     if (state != TAG_NONE) {
@@ -306,6 +307,7 @@ rb_gc_run_obj_finalizer(VALUE objid, long count, VALUE (*callback)(long i, void
         rb_check_funcall(saved.final, idCall, 1, &objid);
     }
     EC_POP_TAG();
+    rb_ractor_ignore_belonging(false);
 #undef RESTORE_FINALIZER
 }
 
diff --git a/ractor.c b/ractor.c
index 2f4dfecd1a..56345d5670 100644
--- a/ractor.c
+++ b/ractor.c
@@ -33,6 +33,11 @@ static VALUE rb_cRactorMovedObject;
 
 static void vm_ractor_blocking_cnt_inc(rb_vm_t *vm, rb_ractor_t *r, const char *file, int line);
 
+
+#if RACTOR_CHECK_MODE > 0
+bool rb_ractor_ignore_belonging_flag = false;
+#endif
+
 // Ractor locking
 
 static void
diff --git a/ractor_core.h b/ractor_core.h
index 5eee15ad15..1e37463466 100644
--- a/ractor_core.h
+++ b/ractor_core.h
@@ -266,9 +266,13 @@ rb_ractor_belonging(VALUE obj)
     }
 }
 
+extern bool rb_ractor_ignore_belonging_flag;
+
 static inline VALUE
 rb_ractor_confirm_belonging(VALUE obj)
 {
+    if (rb_ractor_ignore_belonging_flag) return obj;
+
     uint32_t id = rb_ractor_belonging(obj);
 
     if (id == 0) {
@@ -288,6 +292,14 @@ rb_ractor_confirm_belonging(VALUE obj)
     }
     return obj;
 }
+
+static inline void
+rb_ractor_ignore_belonging(bool flag)
+{
+    rb_ractor_ignore_belonging_flag = flag;
+}
+
 #else
 #define rb_ractor_confirm_belonging(obj) obj
+#define rb_ractor_ignore_belonging(flag) (0)
 #endif