diff --git a/src/Perl6/Metamodel/BOOTSTRAP.nqp b/src/Perl6/Metamodel/BOOTSTRAP.nqp
index 7daa77ac546..0e50b3ca9ef 100644
--- a/src/Perl6/Metamodel/BOOTSTRAP.nqp
+++ b/src/Perl6/Metamodel/BOOTSTRAP.nqp
@@ -618,7 +618,7 @@ my class Binder {
                 $default_value;
             }
             else {
-                $default_value()
+                nqp::p6capturelexwhere($default_value.clone)();
             }
         }