2 files changed, 2 insertions, 2 deletions

diff --git a/toxcore/onion_client.c b/toxcore/onion_client.c
index 1fe54d85..630882cc 100644
--- a/toxcore/onion_client.c
+++ b/toxcore/onion_client.c
@@ -530,7 +530,7 @@ static int handle_fakeid_announce(void *object, const uint8_t *source_pubkey, co
  * return the number of packets sent on success
  * return -1 on failure.
  */
-int send_onion_data(Onion_Client *onion_c, int friend_num, uint8_t *data, uint32_t length)
+int send_onion_data(const Onion_Client *onion_c, int friend_num, const uint8_t *data, uint32_t length)
 {
     if ((uint32_t)friend_num >= onion_c->num_friends)
         return -1;
diff --git a/toxcore/onion_client.h b/toxcore/onion_client.h
index df7be2ef..a74783f6 100644
--- a/toxcore/onion_client.h
+++ b/toxcore/onion_client.h
@@ -212,7 +212,7 @@ uint64_t onion_getfriend_DHT_pubkey(Onion_Client *onion_c, int friend_num, uint8
  * return the number of packets sent on success
  * return -1 on failure.
  */
-int send_onion_data(Onion_Client *onion_c, int friend_num, uint8_t *data, uint32_t length);
+int send_onion_data(const Onion_Client *onion_c, int friend_num, const uint8_t *data, uint32_t length);
 
 /* Function to call when onion data packet with contents beginning with byte is received. */
 void oniondata_registerhandler(Onion_Client *onion_c, uint8_t byte, oniondata_handler_callback cb, void *object);