1 files changed, 1 insertions, 1 deletions

diff --git a/toxcore/network.h b/toxcore/network.h
index e5c24a2d..359d26c8 100644
--- a/toxcore/network.h
+++ b/toxcore/network.h
@@ -270,7 +270,7 @@ int addr_resolve_or_parse_ip(const char *address, IP *to, IP *extra);
  * Packet data is put into data.
  * Packet length is put into length.
  */
-typedef int (*packet_handler_callback)(void *object, IP_Port ip_port, uint8_t *data, uint32_t len);
+typedef int (*packet_handler_callback)(void *object, IP_Port ip_port, const uint8_t *data, uint32_t len);
 
 typedef struct {
     packet_handler_callback function;