diff --git a/tutorial01_answer/leptjson.c b/tutorial01_answer/leptjson.c
index f4f2b17b..5fead438 100644
--- a/tutorial01_answer/leptjson.c
+++ b/tutorial01_answer/leptjson.c
@@ -63,6 +63,7 @@ int lept_parse(lept_value* v, const char* json) {
         lept_parse_whitespace(&c);
         if (*c.json != '\0')
             ret = LEPT_PARSE_ROOT_NOT_SINGULAR;
+            v->type = LEPT_NULL;
     }
     return ret;
 }