diff --git a/appl/ftp/ftpd/ftpd.c b/appl/ftp/ftpd/ftpd.c
index 0af6864ef..578cb6fac 100644
--- a/appl/ftp/ftpd/ftpd.c
+++ b/appl/ftp/ftpd/ftpd.c
@@ -774,7 +774,7 @@ int do_login(int code, char *passwd)
 		  "%s: anonymous/%s",
 		  remotehost,
 		  passwd);
-	setproctitle(proctitle);
+	setproctitle("%s", proctitle);
 #endif /* HAVE_SETPROCTITLE */
 	if (logging) {
 	    char data_addr[256];
@@ -794,7 +794,7 @@ int do_login(int code, char *passwd)
 	reply(code, "User %s logged in.", pw->pw_name);
 #ifdef HAVE_SETPROCTITLE
 	snprintf(proctitle, sizeof(proctitle), "%s: %s", remotehost, pw->pw_name);
-	setproctitle(proctitle);
+	setproctitle("%s", proctitle);
 #endif /* HAVE_SETPROCTITLE */
 	if (logging) {
 	    char data_addr[256];
@@ -1817,7 +1817,7 @@ dolog(struct sockaddr *sa, int len)
 			      NULL, 0, 0);
 #ifdef HAVE_SETPROCTITLE
 	snprintf(proctitle, sizeof(proctitle), "%s: connected", remotehost);
-	setproctitle(proctitle);
+	setproctitle("%s", proctitle);
 #endif /* HAVE_SETPROCTITLE */
 
 	if (logging) {