diff --git a/cmd/otk/osbuild-make-ostree-source/main.go b/cmd/otk/osbuild-make-ostree-source/main.go
index 1c47648fd1..0cda5b9911 100644
--- a/cmd/otk/osbuild-make-ostree-source/main.go
+++ b/cmd/otk/osbuild-make-ostree-source/main.go
@@ -6,33 +6,17 @@ import (
 	"io"
 	"os"
 
+	"github.com/osbuild/images/internal/otkostree"
 	"github.com/osbuild/images/pkg/osbuild"
 	"github.com/osbuild/images/pkg/ostree"
 )
 
-// TODO: move structs to common package with resolver external
-
 type Input struct {
 	Tree InputTree `json:"tree"`
 }
 
 type InputTree struct {
-	Const InputConst `json:"const"`
-}
-
-type InputConst struct {
-	// Ref of the commit (can be empty).
-	Ref string `json:"ref,omitempty"`
-
-	// URL of the repo where the commit can be fetched.
-	URL string `json:"url"`
-
-	// Secrets type to use when pulling the ostree commit content
-	// (e.g. org.osbuild.rhsm.consumer).
-	Secrets string `json:"secrets,omitempty"`
-
-	// Checksum of the commit.
-	Checksum string `json:"checksum"`
+	Const otkostree.ResolvedConst `json:"const"`
 }
 
 type Output struct {
diff --git a/cmd/otk/osbuild-resolve-ostree-commit/main.go b/cmd/otk/osbuild-resolve-ostree-commit/main.go
index ee051ce9a3..b99b3346a9 100644
--- a/cmd/otk/osbuild-resolve-ostree-commit/main.go
+++ b/cmd/otk/osbuild-resolve-ostree-commit/main.go
@@ -7,6 +7,7 @@ import (
 	"os"
 
 	"github.com/osbuild/images/internal/cmdutil"
+	"github.com/osbuild/images/internal/otkostree"
 	"github.com/osbuild/images/pkg/ostree"
 )
 
@@ -31,22 +32,7 @@ type Input struct {
 // Output contains everything needed to write a manifest that requires pulling
 // an ostree commit.
 type Output struct {
-	Const OutputConst `json:"const"`
-}
-
-type OutputConst struct {
-	// Ref of the commit (can be empty).
-	Ref string `json:"ref,omitempty"`
-
-	// URL of the repo where the commit can be fetched.
-	URL string `json:"url"`
-
-	// Secrets type to use when pulling the ostree commit content
-	// (e.g. org.osbuild.rhsm.consumer).
-	Secrets string `json:"secrets,omitempty"`
-
-	// Checksum of the commit.
-	Checksum string `json:"checksum"`
+	Const otkostree.ResolvedConst `json:"const"`
 }
 
 // for mocking in testing
@@ -78,7 +64,7 @@ func run(r io.Reader, w io.Writer) error {
 
 	output := map[string]Output{
 		"tree": {
-			Const: OutputConst{
+			Const: otkostree.ResolvedConst{
 				Ref:      commitSpec.Ref,
 				URL:      commitSpec.URL,
 				Secrets:  commitSpec.Secrets,
diff --git a/internal/otkostree/types.go b/internal/otkostree/types.go
new file mode 100644
index 0000000000..a3c66e91ce
--- /dev/null
+++ b/internal/otkostree/types.go
@@ -0,0 +1,16 @@
+package otkostree
+
+type ResolvedConst struct {
+	// Ref of the commit (can be empty).
+	Ref string `json:"ref,omitempty"`
+
+	// URL of the repo where the commit can be fetched.
+	URL string `json:"url"`
+
+	// Secrets type to use when pulling the ostree commit content
+	// (e.g. org.osbuild.rhsm.consumer).
+	Secrets string `json:"secrets,omitempty"`
+
+	// Checksum of the commit.
+	Checksum string `json:"checksum"`
+}