diff --git a/data/variant.hh b/data/variant.hh
index 1ffc5b26..8d0f06f6 100644
--- a/data/variant.hh
+++ b/data/variant.hh
@@ -122,7 +122,7 @@ m4_define([b4_variant_define],
       YYASSERT (!yytypeid_);
       YYASSERT (sizeof (T) <= S);
       yytypeid_ = & typeid (T);])[
-      return *new (yyas_<T> ()) T;
+      return *new (yyas_<T> ()) T ();
     }
 
     /// Instantiate a \a T in here from \a t.