Index: aux_/arg_list.hpp
===================================================================
--- aux_/arg_list.hpp	(revision 42307)
+++ aux_/arg_list.hpp	(working copy)
@@ -24,6 +24,7 @@
 #include <boost/type_traits/is_same.hpp>
 #include <boost/type_traits/is_base_and_derived.hpp>
 #include <boost/preprocessor/repetition/enum_params.hpp>
+#include <boost/preprocessor/repetition/enum_binary_params.hpp>
 #include <boost/preprocessor/facilities/intercept.hpp>
 
 namespace boost { namespace parameter { 
Index: preprocessor.hpp
===================================================================
--- preprocessor.hpp	(revision 42307)
+++ preprocessor.hpp	(working copy)
@@ -14,6 +14,7 @@
 # include <boost/parameter/aux_/preprocessor/flatten.hpp>
 
 # include <boost/preprocessor/repetition/repeat_from_to.hpp>
+# include <boost/preprocessor/comparison/equal.hpp>
 # include <boost/preprocessor/control/if.hpp>
 # include <boost/preprocessor/control/expr_if.hpp>
 # include <boost/preprocessor/repetition/enum_params.hpp>
@@ -21,11 +22,13 @@
 # include <boost/preprocessor/repetition/enum_trailing.hpp>
 # include <boost/preprocessor/seq/first_n.hpp>
 # include <boost/preprocessor/seq/for_each_product.hpp>
-# include <boost/preprocessor/seq/for_each_i.hpp> 
-# include <boost/preprocessor/tuple/elem.hpp> 
+# include <boost/preprocessor/seq/for_each_i.hpp>
+# include <boost/preprocessor/tuple/elem.hpp>
+# include <boost/preprocessor/tuple/eat.hpp>
 # include <boost/preprocessor/seq/fold_left.hpp>
 # include <boost/preprocessor/seq/size.hpp>
 # include <boost/preprocessor/seq/enum.hpp>
+# include <boost/preprocessor/seq/push_back.hpp>
 
 # include <boost/preprocessor/detail/is_nullary.hpp>