diff --git a/compiler/bytecode.go b/compiler/bytecode.go
index 9d13d0b..6e87585 100644
--- a/compiler/bytecode.go
+++ b/compiler/bytecode.go
@@ -42,11 +42,12 @@ func init() {
 	gob.Register(&objects.Bool{})
 	gob.Register(&objects.Char{})
 	gob.Register(&objects.Array{})
+	gob.Register(&objects.ImmutableArray{})
 	gob.Register(&objects.Map{})
+	gob.Register(&objects.ImmutableMap{})
 	gob.Register(&objects.CompiledFunction{})
 	gob.Register(&objects.Undefined{})
 	gob.Register(&objects.Error{})
-	gob.Register(&objects.ImmutableMap{})
 	gob.Register(&objects.Bytes{})
 	gob.Register(&objects.StringIterator{})
 	gob.Register(&objects.MapIterator{})