{
       int saved_errno = errno;
diff --git a/timezone/zic.c b/timezone/zic.c
index a5202a1..772d081 100644
--- a/timezone/zic.c
+++ b/timezone/zic.c
@@ -1609,7 +1609,7 @@ writezone(const char *const name, const char *const string)
 		}
 #define DO(field)	((void) fwrite(tzh.field, sizeof tzh.field, 1, fp))
 		tzh = tzh0;
-		(void) strncpy(tzh.tzh_magic, TZ_MAGIC, sizeof tzh.tzh_magic);