diff --git a/pkg/types/100/types.go b/pkg/types/100/types.go
index c1392571..524753e3 100644
--- a/pkg/types/100/types.go
+++ b/pkg/types/100/types.go
@@ -273,6 +273,7 @@ type Interface struct {
 	Sandbox    string `json:"sandbox,omitempty"`
 	SocketPath string `json:"socketPath,omitempty"`
 	PciID      string `json:"pciID,omitempty"`
+	Metadata map[string]string `json:"metadata,omitempty"`
 }
 
 func (i *Interface) String() string {
diff --git a/pkg/types/100/types_test.go b/pkg/types/100/types_test.go
index e74060c6..3a3d1571 100644
--- a/pkg/types/100/types_test.go
+++ b/pkg/types/100/types_test.go
@@ -55,6 +55,7 @@ func testResult() *current.Result {
 				Sandbox:    "/proc/3553/ns/net",
 				PciID:      "8086:9a01",
 				SocketPath: "/path/to/vhost/fd",
+				Metadata: make(map[string]string),
 			},
 		},
 		IPs: []*current.IPConfig{
diff --git a/pkg/types/types_test.go b/pkg/types/types_test.go
index 73cd9ec6..c12ad815 100644
--- a/pkg/types/types_test.go
+++ b/pkg/types/types_test.go
@@ -169,6 +169,7 @@ var _ = Describe("Types", func() {
 						Sandbox:    "/proc/3553/ns/net",
 						PciID:      "8086:9a01",
 						SocketPath: "/path/to/vhost/fd",
+						Metadata: make(map[string]string),
 					},
 				},
 				IPs: []*current.IPConfig{