diff --git a/pkg/api/bindings.go b/pkg/api/bindings.go
index 7e9b838..871e449 100644
--- a/pkg/api/bindings.go
+++ b/pkg/api/bindings.go
@@ -98,6 +98,7 @@ func AsCloudEvent(event CDEventReader) (*cloudevents.Event, error) {
 		return nil, fmt.Errorf("cannot validate CDEvent %v", err)
 	}
 	ce := cloudevents.NewEvent()
+	ce.SetID(event.GetId())
 	ce.SetSource(event.GetSource())
 	ce.SetSubject(event.GetSubjectId())
 	ce.SetType(event.GetType().String())
diff --git a/pkg/api/bindings_test.go b/pkg/api/bindings_test.go
index e882cb3..0bc51d7 100644
--- a/pkg/api/bindings_test.go
+++ b/pkg/api/bindings_test.go
@@ -116,6 +116,9 @@ func TestAsCloudEvent(t *testing.T) {
 			if err != nil {
 				t.Fatalf("didn't expected it to fail, but it did: %v", err)
 			}
+			if d := cmp.Diff(tc.event.GetId(), ce.Context.GetID()); d != "" {
+				t.Errorf("args: diff(-want,+got):\n%s", d)
+			}
 			if d := cmp.Diff(testSubjectId, ce.Context.GetSubject()); d != "" {
 				t.Errorf("args: diff(-want,+got):\n%s", d)
 			}