diff --git a/include/boost/phoenix/core/is_nullary.hpp b/include/boost/phoenix/core/is_nullary.hpp
index f6c2261..8d8234f 100644
--- a/include/boost/phoenix/core/is_nullary.hpp
+++ b/include/boost/phoenix/core/is_nullary.hpp
@@ -162,7 +162,7 @@ namespace boost { namespace phoenix
         template <typename T>
         struct is_nullary<custom_terminal<T>,
         typename custom_terminal<T>::_is_local_var_custom_terminal >
-            : mpl::true_
+            : mpl::false_
 	    {};
 
         template <typename T>