diff --git a/ext/objspace/objspace.c b/ext/objspace/objspace.c
index 9f5021368a..1c9341de54 100644
--- a/ext/objspace/objspace.c
+++ b/ext/objspace/objspace.c
@@ -188,6 +188,7 @@ type2sym(enum ruby_value_type i)
 	CASE_TYPE(T_IMEMO);
 	CASE_TYPE(T_NODE);
 	CASE_TYPE(T_ICLASS);
+	CASE_TYPE(T_MOVED);
 	CASE_TYPE(T_ZOMBIE);
 #undef CASE_TYPE
       default: rb_bug("type2sym: unknown type (%d)", i);