diff --git a/core/my_basic.h b/core/my_basic.h
index a622442..b0f8e2c 100755
--- a/core/my_basic.h
+++ b/core/my_basic.h
@@ -422,6 +422,7 @@ typedef enum mb_error_e {
 	SE_RN_CLASS_EXPECTED,
 	SE_RN_DUPLICATE_CLASS,
 	SE_RN_WRONG_META_CLASS,
+	SE_RN_HASH_AND_COMPARE_MUST_COME_TOGETHER,
 	SE_RN_CANNOT_CHANGE_ME,
 	SE_RN_INVALID_LAMBDA,
 	SE_RN_LIST_EXPECTED,