diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index a32c5c7dcfd8..da87615ad69a 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -146,7 +146,7 @@ static int debugfs_locked_down(struct inode *inode,
 			       struct file *filp,
 			       const struct file_operations *real_fops)
 {
-	if ((inode->i_mode & 07777) == 0444 &&
+	if ((inode->i_mode & 07777 & ~0444) == 0 &&
 	    !(filp->f_mode & FMODE_WRITE) &&
 	    !real_fops->unlocked_ioctl &&
 	    !real_fops->compat_ioctl &&