diff --git a/request-errors.go b/request-errors.go
index 6505b5c7..b0b5cbf1 100644
--- a/request-errors.go
+++ b/request-errors.go
@@ -6,15 +6,38 @@ type fxerr uint32
 // direct control of the errors being sent vs. letting the library work them
 // out from the standard os/io errors.
 const (
-	ErrSSHFxOk               = fxerr(sshFxOk)
-	ErrSSHFxEOF              = fxerr(sshFxEOF)
-	ErrSSHFxNoSuchFile       = fxerr(sshFxNoSuchFile)
-	ErrSSHFxPermissionDenied = fxerr(sshFxPermissionDenied)
-	ErrSSHFxFailure          = fxerr(sshFxFailure)
-	ErrSSHFxBadMessage       = fxerr(sshFxBadMessage)
-	ErrSSHFxNoConnection     = fxerr(sshFxNoConnection)
-	ErrSSHFxConnectionLost   = fxerr(sshFxConnectionLost)
-	ErrSSHFxOpUnsupported    = fxerr(sshFxOPUnsupported)
+	ErrSSHFxOk                      = fxerr(sshFxOk)
+	ErrSSHFxEOF                     = fxerr(sshFxEOF)
+	ErrSSHFxNoSuchFile              = fxerr(sshFxNoSuchFile)
+	ErrSSHFxPermissionDenied        = fxerr(sshFxPermissionDenied)
+	ErrSSHFxFailure                 = fxerr(sshFxFailure)
+	ErrSSHFxBadMessage              = fxerr(sshFxBadMessage)
+	ErrSSHFxNoConnection            = fxerr(sshFxNoConnection)
+	ErrSSHFxConnectionLost          = fxerr(sshFxConnectionLost)
+	ErrSSHFxOpUnsupported           = fxerr(sshFxOPUnsupported)
+	ErrSSHFxInvalidHandle           = fxerr(sshFxInvalidHandle)
+	ErrSSHFxNoSuchPath              = fxerr(sshFxNoSuchPath)
+	ErrSSHFxFileAlreadyExists       = fxerr(sshFxFileAlreadyExists)
+	ErrSSHFxWriteProtect            = fxerr(sshFxWriteProtect)
+	ErrSSHFxNoMedia                 = fxerr(sshFxNoMedia)
+	ErrSSHFxNoSpaceOnFilesystem     = fxerr(sshFxNoSpaceOnFilesystem)
+	ErrSSHFxQuotaExceeded           = fxerr(sshFxQuotaExceeded)
+	ErrSSHFxUnknownPrincipal        = fxerr(sshFxUnknownPrincipal)
+	ErrSSHFxLockConflict            = fxerr(sshFxLockConflict)
+	ErrSSHFxDirNotEmpty             = fxerr(sshFxDirNotEmpty)
+	ErrSSHFxNotADirectory           = fxerr(sshFxNotADirectory)
+	ErrSSHFxInvalidFilename         = fxerr(sshFxInvalidFilename)
+	ErrSSHFxLinkLoop                = fxerr(sshFxLinkLoop)
+	ErrSSHFxCannotDelete            = fxerr(sshFxCannotDelete)
+	ErrSSHFxInvalidParameter        = fxerr(sshFxInvalidParameter)
+	ErrSSHFxFileIsADirectory        = fxerr(sshFxFileIsADirectory)
+	ErrSSHFxByteRangeLockConflict   = fxerr(sshFxByteRangeLockConflict)
+	ErrSSHFxByteRangeLockRefused    = fxerr(sshFxByteRangeLockRefused)
+	ErrSSHFxDeletePending           = fxerr(sshFxDeletePending)
+	ErrSSHFxFileCorrupt             = fxerr(sshFxFileCorrupt)
+	ErrSSHFxOwnerInvalid            = fxerr(sshFxOwnerInvalid)
+	ErrSSHFxGroupInvalid            = fxerr(sshFxGroupInvalid)
+	ErrSSHFxNoMatchingByteRangeLock = fxerr(sshFxNoMatchingByteRangeLock)
 )
 
 // Deprecated error types, these are aliases for the new ones, please use the new ones directly
@@ -48,6 +71,52 @@ func (e fxerr) Error() string {
 		return "connection lost"
 	case ErrSSHFxOpUnsupported:
 		return "operation unsupported"
+	case ErrSSHFxInvalidHandle:
+		return "the handle value was invalid"
+	case ErrSSHFxNoSuchPath:
+		return "the file path does not exist or is invalid"
+	case ErrSSHFxFileAlreadyExists:
+		return "the file already exists"
+	case ErrSSHFxWriteProtect:
+		return "the file is on read-only media, or the media is write protected"
+	case ErrSSHFxNoMedia:
+		return "the requested operation cannot be completed because there is no media available in the drive"
+	case ErrSSHFxNoSpaceOnFilesystem:
+		return "the requested operation cannot be completed because there is insufficient free space on the filesystem"
+	case ErrSSHFxQuotaExceeded:
+		return "the operation cannot be completed because it would exceed the user's storage quota"
+	case ErrSSHFxUnknownPrincipal:
+		return "a principal referenced by the request (either the 'owner', 'group', or 'who' field of an ACL), was unknown"
+	case ErrSSHFxLockConflict:
+		return "the file could not be opened because it is locked by another process"
+	case ErrSSHFxDirNotEmpty:
+		return "the directory is not empty"
+	case ErrSSHFxNotADirectory:
+		return "the specified file is not a directory"
+	case ErrSSHFxInvalidFilename:
+		return "the filename is not valid"
+	case ErrSSHFxLinkLoop:
+		return "too many symbolic links encountered or, an SSH_FXF_NOFOLLOW open encountered a symbolic link as the final component"
+	case ErrSSHFxCannotDelete:
+		return "the file cannot be deleted"
+	case ErrSSHFxInvalidParameter:
+		return "one of the parameters was out of range, or the parameters specified cannot be used together"
+	case ErrSSHFxFileIsADirectory:
+		return "the specified file was a directory in a context where a directory cannot be used"
+	case ErrSSHFxByteRangeLockConflict:
+		return "a read or write operation failed because another process's mandatory byte-range lock overlaps with the request"
+	case ErrSSHFxByteRangeLockRefused:
+		return "a request for a byte range lock was refused"
+	case ErrSSHFxDeletePending:
+		return "an operation was attempted on a file for which a delete operation is pending"
+	case ErrSSHFxFileCorrupt:
+		return "the file is corrupt; an filesystem integrity check should be run"
+	case ErrSSHFxOwnerInvalid:
+		return "the principal specified can not be assigned as an owner of a file"
+	case ErrSSHFxGroupInvalid:
+		return "the principal specified can not be assigned as the primary group of a file"
+	case ErrSSHFxNoMatchingByteRangeLock:
+		return "the requested operation could not be completed because the specified byte range lock has not been granted"
 	default:
 		return "failure"
 	}