diff --git a/main.c b/main.c
index ac15032..e465329 100644
--- a/main.c
+++ b/main.c
@@ -1936,7 +1936,9 @@ spawn ()
 #endif	/* LASTLOG */
 #endif	/* UTMP */
 
+#ifdef UTMP
 	memset (&utmp, '\0', sizeof(utmp));
+#endif
 
 	screen->uid = getuid();
 	screen->gid = getgid();