extern time_t rrd_stats_json(int type, RRDSET *st, BUFFER *wb, long entries_to_show, long group, int group_method, time_t after, time_t before, int only_non_zero);
extern int rrd2format(RRDSET *st, BUFFER *out, BUFFER *dimensions, uint32_t format, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp);
-extern int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, BUFFER *dimensions, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp, int *value_is_null);
+extern int rrd2value(RRDSET *st, BUFFER *wb, calculated_number *n, const char *dimensions, long points, long long after, long long before, int group_method, uint32_t options, time_t *latest_timestamp, int *value_is_null);
#endif /* NETDATA_RRD2JSON_H */