diff --git a/auto_tests/toxav_basic_test.c b/auto_tests/toxav_basic_test.c
index c35af2705..ce3185dec 100644
--- a/auto_tests/toxav_basic_test.c
+++ b/auto_tests/toxav_basic_test.c
@@ -50,7 +50,7 @@ typedef struct _Status {
 /* My default settings */
 static ToxAvCodecSettings muhcaps;
 
-void accept_friend_request(Tox *m, uint8_t *public_key, uint8_t *data, uint16_t length, void *userdata)
+void accept_friend_request(Tox *m, const uint8_t *public_key, const uint8_t *data, uint16_t length, void *userdata)
 {
     if (length == 7 && memcmp("gentoo", data, 7) == 0) {
         tox_add_friend_norequest(m, public_key);
diff --git a/toxcore/tox.c b/toxcore/tox.c
index 008440a4e..79e4c042c 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -72,7 +72,7 @@ int32_t tox_add_friend(Tox *tox, uint8_t *address, uint8_t *data, uint16_t lengt
  *  return the friend number if success.
  *  return -1 if failure.
  */
-int32_t tox_add_friend_norequest(Tox *tox, uint8_t *client_id)
+int32_t tox_add_friend_norequest(Tox *tox, const uint8_t *client_id)
 {
     Messenger *m = tox;
     return m_addfriend_norequest(m, client_id);
diff --git a/toxcore/tox.h b/toxcore/tox.h
index f0390fe19..afa502f55 100644
--- a/toxcore/tox.h
+++ b/toxcore/tox.h
@@ -107,7 +107,7 @@ int32_t tox_add_friend(Tox *tox, uint8_t *address, uint8_t *data, uint16_t lengt
  *  return the friend number if success.
  *  return -1 if failure.
  */
-int32_t tox_add_friend_norequest(Tox *tox, uint8_t *client_id);
+int32_t tox_add_friend_norequest(Tox *tox, const uint8_t *client_id);
 
 /*  return the friend number associated to that client id.
     return -1 if no such friend */