No "size_t len" argument to function 'jsmn_parse'

[makorne]

json.h: error: too few arguments to function 'jsmn_parse'
int ret = jsmn_parse(&parser, js, tokens, n);
int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
jsmntok_t *tokens, unsigned int num_tokens);

[ghost]

    ret = jsmn_parse(&parser, js, strlen(js), tokens, n);