diff --git a/login/utmp_file.c b/login/utmp_file.c
index 54f424f..8b6fee9 100644
--- a/login/utmp_file.c
+++ b/login/utmp_file.c
@@ -85,7 +85,7 @@ try_file_lock (struct file_locking *locking, int fd, int type)
   alarm (TIMEOUT);
 
   /* Try to get the lock.  */
- struct flock fl =
+ struct flock64 fl =
    {
     .l_type = type,
     fl.l_whence = SEEK_SET,
@@ -96,7 +96,7 @@ try_file_lock (struct file_locking *locking, int fd, int type)
 static void
 file_unlock (int fd)
 {
-  struct flock fl =
+  struct flock64 fl =
     {
       .l_type = F_UNLCK,
     };