119c119
< extern void json_object_object_add(struct json_object* obj, char *key,
---
> extern void json_object_object_add(struct json_object* obj, const char *key,
128c128
< 						  char *key);
---
> 						  const char *key);
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< extern struct json_object* json_object_new_string(char *s);
---
> extern struct json_object* json_object_new_string(const char *s);
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< extern struct json_object* json_object_new_string_len(char *s, int len);
---
> extern struct json_object* json_object_new_string_len(const char *s, int len);