diff --git a/fixtures/parcel.go b/fixtures/parcel.go
index a06b19ce..d149a2b3 100644
--- a/fixtures/parcel.go
+++ b/fixtures/parcel.go
@@ -1,6 +1,7 @@
 package fixtures
 
 import (
+	"reflect"
 	"strconv"
 	"sync"
 	"time"
@@ -72,6 +73,11 @@ func NewParcel(
 		panic(err)
 	}
 
+	portableName, err := stubs.Marshaler.MarshalType(reflect.TypeOf(m))
+	if err != nil {
+		panic(err)
+	}
+
 	env := &envelopespec.Envelope{
 		MessageId:     id,
 		CausationId:   "<cause>",
@@ -87,7 +93,7 @@ func NewParcel(
 		SourceInstanceId: "<instance>",
 		CreatedAt:        createdAt.Format(time.RFC3339Nano),
 		Description:      m.MessageDescription(),
-		PortableName:     packet.PortableName(),
+		PortableName:     portableName,
 		MediaType:        packet.MediaType,
 		Data:             packet.Data,
 	}
diff --git a/go.mod b/go.mod
index f44f0045..ce0f6ddc 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/dogmatiq/discoverkit v0.1.2
 	github.com/dogmatiq/dodeca v1.4.2
 	github.com/dogmatiq/dogma v0.14.3
-	github.com/dogmatiq/enginekit v0.12.0
+	github.com/dogmatiq/enginekit v0.15.1
 	github.com/dogmatiq/iago v0.4.0
 	github.com/dogmatiq/interopspec v0.5.4
 	github.com/dogmatiq/kyu v0.2.0
diff --git a/go.sum b/go.sum
index b2fbff29..335c9faa 100644
--- a/go.sum
+++ b/go.sum
@@ -19,8 +19,8 @@ github.com/dogmatiq/dodeca v1.4.2 h1:qVQpMfFju99fvAcV3h1lA0yVaD5X38EpO1my0iKpTqs
 github.com/dogmatiq/dodeca v1.4.2/go.mod h1:kYImsyZhGxSOLiqzTK4Z1CB9ycSLpnJPBQa2yR//N5Q=
 github.com/dogmatiq/dogma v0.14.3 h1:qwZqU1yqp80toUJcJBdFxLlh6xvlFd7jb7rycmriRUo=
 github.com/dogmatiq/dogma v0.14.3/go.mod h1:9lyVA+6V2+E/exV0IrBOrkUiyFwIATEhv+b0vnB2umQ=
-github.com/dogmatiq/enginekit v0.12.0 h1:w16TGKVrvvfTejd6HJ2rhVQGZBW3TSK+o3heo7gTEog=
-github.com/dogmatiq/enginekit v0.12.0/go.mod h1:o0xikkm3INnWBjIXvJ9LffjdYRhIG3jwFNDyhTk1hcI=
+github.com/dogmatiq/enginekit v0.15.1 h1:i5FhnfTNyIZwgqHlH9MNU/9kDoOXvnDLi40FtIkUhbo=
+github.com/dogmatiq/enginekit v0.15.1/go.mod h1:VYNGtuEGGYOnJqvSzi40QnkptFSfuSGeVk0jV83lzUA=
 github.com/dogmatiq/iago v0.4.0 h1:57nZqVT34IZxtCZEW/RFif7DNUEjMXgevfr/Mmd0N8I=
 github.com/dogmatiq/iago v0.4.0/go.mod h1:fishMWBtzYcjgis6d873VTv9kFm/wHYLOzOyO9ECBDc=
 github.com/dogmatiq/interopspec v0.5.4 h1:klyGPy16zUKJartJIJOBZ4JrQ4LxFiY3wgzFTTiNlDk=
diff --git a/parcel/packer.go b/parcel/packer.go
index 91bdcc7d..e1e563d4 100644
--- a/parcel/packer.go
+++ b/parcel/packer.go
@@ -2,11 +2,13 @@ package parcel
 
 import (
 	"fmt"
+	"reflect"
 	"strings"
 	"time"
 
 	"github.com/dogmatiq/configkit/message"
 	"github.com/dogmatiq/dogma"
+	"github.com/dogmatiq/enginekit/enginetest/stubs"
 	"github.com/dogmatiq/enginekit/marshaler"
 	"github.com/dogmatiq/interopspec/envelopespec"
 	"github.com/google/uuid"
@@ -126,6 +128,11 @@ func (p *Packer) new(m dogma.Message, r message.Role) Parcel {
 		panic(err)
 	}
 
+	portableName, err := stubs.Marshaler.MarshalType(reflect.TypeOf(m))
+	if err != nil {
+		panic(err)
+	}
+
 	pcl := Parcel{
 		Envelope: &envelopespec.Envelope{
 			MessageId:         id,
@@ -134,7 +141,7 @@ func (p *Packer) new(m dogma.Message, r message.Role) Parcel {
 			SourceApplication: p.Application,
 			CreatedAt:         now.Format(time.RFC3339Nano),
 			Description:       m.MessageDescription(),
-			PortableName:      packet.PortableName(),
+			PortableName:      portableName,
 			MediaType:         packet.MediaType,
 			Data:              packet.Data,
 		},