diff --git a/lib/failure.c b/lib/failure.c
index 1d2d910a..c4a434ff 100644
--- a/lib/failure.c
+++ b/lib/failure.c
@@ -19,6 +19,7 @@
 #include "failure.h"
 #include "memzero.h"
 #include "prototypes.h"
+#include "strtcpy.h"
 
 
 #define	YEAR	(365L*DAY)
@@ -78,7 +79,7 @@ void failure (uid_t uid, const char *tty, struct faillog *fl)
 		fl->fail_cnt++;
 	}
 
-	strncpy (fl->fail_line, tty, sizeof (fl->fail_line) - 1);
+	STRTCPY(fl->fail_line, tty);
 	(void) time (&fl->fail_time);
 
 	/*