diff --git a/freebsd/netinet/tcp_usrreq.c b/freebsd/netinet/tcp_usrreq.c
index 85f1d56a5..f4e3f305d 100644
--- a/freebsd/netinet/tcp_usrreq.c
+++ b/freebsd/netinet/tcp_usrreq.c
@@ -1566,7 +1566,9 @@ tcp_ctloutput(struct socket *so, struct sockopt *sopt)
 		return (error);
 	} else if ((sopt->sopt_dir == SOPT_GET) && 
 	    (sopt->sopt_name == TCP_FUNCTION_BLK)) {
-		strcpy(fsn.function_set_name, tp->t_fb->tfb_tcp_block_name);
+		strncpy(fsn.function_set_name, tp->t_fb->tfb_tcp_block_name,
+		    TCP_FUNCTION_NAME_LEN_MAX);
+		fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0';
 		fsn.pcbcnt = tp->t_fb->tfb_refcnt;
 		INP_WUNLOCK(inp);
 		error = sooptcopyout(sopt, &fsn, sizeof fsn);