diff --git a/lib/Red/AST/Select.pm6 b/lib/Red/AST/Select.pm6
index fbe03440..ab1fb61f 100644
--- a/lib/Red/AST/Select.pm6
+++ b/lib/Red/AST/Select.pm6
@@ -67,11 +67,9 @@ method minus($sel) {
 }
 
 method as-sub-select {
-    $!sub-select = True;
-    self;
+    self.clone: :sub-select
 }
 
 method as-select {
-    $!sub-select = False;
-    self;
+    self.clone: :!sub-select
 }
diff --git a/lib/Red/ResultSeqMethods.pm6 b/lib/Red/ResultSeqMethods.pm6
index fd3eb8e6..fb5dc913 100644
--- a/lib/Red/ResultSeqMethods.pm6
+++ b/lib/Red/ResultSeqMethods.pm6
@@ -8,7 +8,7 @@ method !agg(Str $func, &block) {
   self.map({
     my @args = block $_;
     Red::AST::Function.new: :$func, :@args
-  }).ast.as-sub-select
+  }).ast: :sub-select
 }
 
 method min(&block) {