fix bug 542

1 files changed, 2 insertions, 3 deletions

diff --git a/src/expr/expr_template.h b/src/expr/expr_template.h
index ace14a10b..756145bda 100644
--- a/src/expr/expr_template.h
+++ b/src/expr/expr_template.h
@@ -81,7 +81,7 @@ namespace expr {
   class CVC4_PUBLIC ExprDag;
   class CVC4_PUBLIC ExprSetLanguage;
 
-  NodeTemplate<true> exportInternal(NodeTemplate<false> n, ExprManager* from, ExprManager* to, ExprManagerMapCollection& vmap, uint32_t flags);
+  class ExportPrivate;
 }/* CVC4::expr namespace */
 
 /**
@@ -591,8 +591,7 @@ private:
   friend class TypeCheckingException;
   friend class expr::pickle::Pickler;
   friend class prop::TheoryProxy;
-  friend NodeTemplate<true> expr::exportInternal(NodeTemplate<false> n, ExprManager* from, ExprManager* to, ExprManagerMapCollection& vmap, uint32_t flags);
-
+  friend class expr::ExportPrivate;
   friend std::ostream& CVC4::operator<<(std::ostream& out, const Expr& e);
   template <bool ref_count> friend class NodeTemplate;