diff --git a/toxcore/TCP_client.c b/toxcore/TCP_client.c
index 2a2289b2..dbcae11b 100644
--- a/toxcore/TCP_client.c
+++ b/toxcore/TCP_client.c
@@ -165,7 +165,7 @@ static int write_packet_TCP_secure_connection(TCP_Client_Connection *con, const
     if ((unsigned int)len == sizeof(packet))
         return 1;
 
-    memcpy(con->last_packet, packet, length);
+    memcpy(con->last_packet, packet, sizeof(packet));
     con->last_packet_length = sizeof(packet);
     con->last_packet_sent = len;
     return 1;
diff --git a/toxcore/TCP_server.c b/toxcore/TCP_server.c
index 6c0133dd..e7ef0d3a 100644
--- a/toxcore/TCP_server.c
+++ b/toxcore/TCP_server.c
@@ -345,7 +345,7 @@ static int write_packet_TCP_secure_connection(TCP_Secure_Connection *con, const
     if ((unsigned int)len == sizeof(packet))
         return 1;
 
-    memcpy(con->last_packet, packet, length);
+    memcpy(con->last_packet, packet, sizeof(packet));
     con->last_packet_length = sizeof(packet);
     con->last_packet_sent = len;
     return 1;