diff --git a/toxcore/TCP_connection.c b/toxcore/TCP_connection.c
index d4c1b7c1..7b478611 100644
--- a/toxcore/TCP_connection.c
+++ b/toxcore/TCP_connection.c
@@ -551,7 +551,7 @@ int set_tcp_connection_to_status(TCP_Connections *tcp_c, int connections_number,
     }
 }
 
-static _Bool tcp_connection_in_conn(TCP_Connection_to *con_to, int tcp_connections_number)
+static _Bool tcp_connection_in_conn(TCP_Connection_to *con_to, unsigned int tcp_connections_number)
 {
     unsigned int i;
 
@@ -567,7 +567,7 @@ static _Bool tcp_connection_in_conn(TCP_Connection_to *con_to, int tcp_connectio
 /* return index on success.
  * return -1 on failure.
  */
-static int add_tcp_connection_to_conn(TCP_Connection_to *con_to, int tcp_connections_number)
+static int add_tcp_connection_to_conn(TCP_Connection_to *con_to, unsigned int tcp_connections_number)
 {
     unsigned int i;
 
@@ -589,7 +589,7 @@ static int add_tcp_connection_to_conn(TCP_Connection_to *con_to, int tcp_connect
 /* return index on success.
  * return -1 on failure.
  */
-static int rm_tcp_connection_from_conn(TCP_Connection_to *con_to, int tcp_connections_number)
+static int rm_tcp_connection_from_conn(TCP_Connection_to *con_to, unsigned int tcp_connections_number)
 {
     unsigned int i;
 
@@ -626,8 +626,8 @@ static unsigned int online_tcp_connection_from_conn(TCP_Connection_to *con_to)
 /* return index on success.
  * return -1 on failure.
  */
-static int set_tcp_connection_status(TCP_Connection_to *con_to, int tcp_connections_number, unsigned int status,
-                                     uint8_t connection_id)
+static int set_tcp_connection_status(TCP_Connection_to *con_to, unsigned int tcp_connections_number,
+                                     unsigned int status, uint8_t connection_id)
 {
     unsigned int i;