Index: pkg/Rcpp/inst/include/Rcpp/module/Module_generated_class_constructor.h
===================================================================
--- pkg/Rcpp/inst/include/Rcpp/module/Module_generated_class_constructor.h	(revision 2721)
+++ pkg/Rcpp/inst/include/Rcpp/module/Module_generated_class_constructor.h	(working copy)
@@ -100,7 +100,7 @@
         return *this ;   
     }
     
-    self& constructor( const char* docstring="", ValidConstructor valid = &yes ){
+    self& constructor( const char* docstring="", ValidConstructor valid = &yes_arity<0> ){
         AddConstructor( new Constructor_0<Class>, valid , docstring) ;
         return *this ;
     }
Index: pkg/Rcpp/inst/include/Rcpp/module/Module_generated_Constructor.h
===================================================================
--- pkg/Rcpp/inst/include/Rcpp/module/Module_generated_Constructor.h	(revision 2721)
+++ pkg/Rcpp/inst/include/Rcpp/module/Module_generated_Constructor.h	(working copy)
@@ -34,7 +34,7 @@
 class Constructor_0 : public Constructor_Base<Class>{
 public:
     virtual Class* get_new( SEXP* args, int nargs ){
-	return new Class ;
+	return new Class() ;
     }
     virtual int nargs(){ return 0 ; }
     virtual const char* signature(const std::string& class_name ){