diff --git a/container/service.go b/container/service.go
index 5f446da..4d3747e 100644
--- a/container/service.go
+++ b/container/service.go
@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/binary"
 
+	"github.com/nspcc-dev/neofs-proto/internal"
 	"github.com/nspcc-dev/neofs-proto/refs"
 	"github.com/pkg/errors"
 )
@@ -19,6 +20,11 @@ type (
 	MessageID = refs.MessageID
 )
 
+const (
+	// ErrNotFound is raised when container could not be found.
+	ErrNotFound = internal.Error("could not find container")
+)
+
 // SetSignature sets signature to PutRequest to satisfy SignedRequest interface.
 func (m *PutRequest) SetSignature(v []byte) { m.Signature = v }