diff --git a/toxav/bwcontroller.c b/toxav/bwcontroller.c
index 48afba82..b7390e4a 100644
--- a/toxav/bwcontroller.c
+++ b/toxav/bwcontroller.c
@@ -173,7 +173,7 @@ void send_update(BWController *bwc)
             b_msg->lost = htonl(bwc->cycle.lost);
             b_msg->recv = htonl(bwc->cycle.recv);
 
-            if (-1 == send_custom_lossy_packet(bwc->m, bwc->friend_number, p_msg, sizeof(p_msg))) {
+            if (-1 == m_send_custom_lossy_packet(bwc->m, bwc->friend_number, p_msg, sizeof(p_msg))) {
                 LOGGER_WARNING(bwc->m->log, "BWC send failed (len: %d)! std error: %s", sizeof(p_msg), strerror(errno));
             }
         }
diff --git a/toxav/rtp.c b/toxav/rtp.c
index f453ff5b..1c6bed75 100644
--- a/toxav/rtp.c
+++ b/toxav/rtp.c
@@ -148,7 +148,7 @@ int rtp_send_data(RTPSession *session, const uint8_t *data, uint16_t length, Log
 
         memcpy(rdata + 1 + sizeof(struct RTPHeader), data, length);
 
-        if (-1 == send_custom_lossy_packet(session->m, session->friend_number, rdata, sizeof(rdata))) {
+        if (-1 == m_send_custom_lossy_packet(session->m, session->friend_number, rdata, sizeof(rdata))) {
             LOGGER_WARNING(session->m->log, "RTP send failed (len: %d)! std error: %s", sizeof(rdata), strerror(errno));
         }
     } else {
@@ -164,8 +164,8 @@ int rtp_send_data(RTPSession *session, const uint8_t *data, uint16_t length, Log
         while ((length - sent) + sizeof(struct RTPHeader) + 1 > MAX_CRYPTO_DATA_SIZE) {
             memcpy(rdata + 1 + sizeof(struct RTPHeader), data + sent, piece);
 
-            if (-1 == send_custom_lossy_packet(session->m, session->friend_number,
-                                               rdata, piece + sizeof(struct RTPHeader) + 1)) {
+            if (-1 == m_send_custom_lossy_packet(session->m, session->friend_number,
+                                                 rdata, piece + sizeof(struct RTPHeader) + 1)) {
                 LOGGER_WARNING(session->m->log, "RTP send failed (len: %d)! std error: %s",
                                piece + sizeof(struct RTPHeader) + 1, strerror(errno));
             }
@@ -180,8 +180,8 @@ int rtp_send_data(RTPSession *session, const uint8_t *data, uint16_t length, Log
         if (piece) {
             memcpy(rdata + 1 + sizeof(struct RTPHeader), data + sent, piece);
 
-            if (-1 == send_custom_lossy_packet(session->m, session->friend_number, rdata,
-                                               piece + sizeof(struct RTPHeader) + 1)) {
+            if (-1 == m_send_custom_lossy_packet(session->m, session->friend_number, rdata,
+                                                 piece + sizeof(struct RTPHeader) + 1)) {
                 LOGGER_WARNING(session->m->log, "RTP send failed (len: %d)! std error: %s",
                                piece + sizeof(struct RTPHeader) + 1, strerror(errno));
             }
diff --git a/toxcore/Messenger.c b/toxcore/Messenger.c
index be311fa1..1771059a 100644
--- a/toxcore/Messenger.c
+++ b/toxcore/Messenger.c
@@ -1782,7 +1782,7 @@ int m_callback_rtp_packet(Messenger *m, int32_t friendnumber, uint8_t byte, int
 }
 
 
-int send_custom_lossy_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length)
+int m_send_custom_lossy_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length)
 {
     if (friend_not_valid(m, friendnumber)) {
         return -1;
diff --git a/toxcore/Messenger.h b/toxcore/Messenger.h
index 8f9a83a9..9bc4c451 100644
--- a/toxcore/Messenger.h
+++ b/toxcore/Messenger.h
@@ -697,7 +697,7 @@ void custom_lossy_packet_registerhandler(Messenger *m, void (*packet_handler_cal
  * return -5 if packet failed to send because of other error.
  * return 0 on success.
  */
-int send_custom_lossy_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length);
+int m_send_custom_lossy_packet(const Messenger *m, int32_t friendnumber, const uint8_t *data, uint32_t length);
 
 
 /* Set handlers for custom lossless packets.
diff --git a/toxcore/tox.c b/toxcore/tox.c
index 6317d126..f964e18c 100644
--- a/toxcore/tox.c
+++ b/toxcore/tox.c
@@ -1593,7 +1593,7 @@ bool tox_friend_send_lossy_packet(Tox *tox, uint32_t friend_number, const uint8_
         return 0;
     }
 
-    int ret = send_custom_lossy_packet(m, friend_number, data, length);
+    int ret = m_send_custom_lossy_packet(m, friend_number, data, length);
 
     set_custom_packet_error(ret, error);