diff --git a/internal/pkg/context.go b/internal/pkg/context.go
index db68b6007..567d79f54 100644
--- a/internal/pkg/context.go
+++ b/internal/pkg/context.go
@@ -79,7 +79,7 @@ func (c *CallCtxt) Struct(i int) Struct {
 	switch v, ok := x.(*adt.Vertex); {
 	case ok && !v.IsList():
 		v.CompleteArcs(c.ctx)
-		return Struct{c.ctx, v}
+		return Struct{v}
 
 	case v != nil:
 		x = v.Value()
@@ -302,7 +302,7 @@ func (c *CallCtxt) CueList(i int) List {
 	if v == nil {
 		return List{}
 	}
-	return List{c.ctx, v, v.BaseValue.(*adt.ListMarker).IsOpen}
+	return List{v, v.BaseValue.(*adt.ListMarker).IsOpen}
 }
 
 func (c *CallCtxt) Iter(i int) (a cue.Iterator) {
diff --git a/internal/pkg/types.go b/internal/pkg/types.go
index 63fc40923..d60f79ec8 100644
--- a/internal/pkg/types.go
+++ b/internal/pkg/types.go
@@ -27,9 +27,8 @@ type Schema = cue.Value
 
 // List represents a CUE list, which can be open or closed.
 type List struct {
-	runtime adt.Runtime
-	node    *adt.Vertex
-	isOpen  bool
+	node   *adt.Vertex
+	isOpen bool
 }
 
 // Elems returns the elements of a list.
@@ -44,8 +43,7 @@ func (l *List) IsOpen() bool {
 
 // Struct represents a CUE struct, which can be open or closed.
 type Struct struct {
-	runtime adt.Runtime
-	node    *adt.Vertex
+	node *adt.Vertex
 }
 
 // Arcs returns all arcs of s.