diff --git a/include/boost/mpi/config.hpp b/include/boost/mpi/config.hpp
index 907a5ba..8d6d919 100644
--- a/include/boost/mpi/config.hpp
+++ b/include/boost/mpi/config.hpp
@@ -13,6 +13,10 @@
 #ifndef BOOST_MPI_CONFIG_HPP
 #define BOOST_MPI_CONFIG_HPP
 
+/* Force MPICH not to define SEEK_SET, SEEK_CUR, and SEEK_END, which
+   conflict with the versions in <stdio.h> and <cstdio>. */
+#define MPICH_IGNORE_CXX_SEEK 1
+
 #include <mpi.h>
 #include <boost/config.hpp>
 
diff --git a/include/boost/mpi/datatype.hpp b/include/boost/mpi/datatype.hpp
index ac3496c..84b3f78 100644
--- a/include/boost/mpi/datatype.hpp
+++ b/include/boost/mpi/datatype.hpp
@@ -25,6 +25,7 @@
 #include <boost/mpl/or.hpp>
 #include <boost/mpi/detail/mpi_datatype_cache.hpp>
 #include <boost/mpl/assert.hpp>
+#include <utility> // for std::pair
 
 namespace boost { namespace mpi {
 
@@ -289,6 +290,11 @@ struct is_mpi_datatype<bool>
   : boost::mpl::bool_<true>
 {};
 
+/// INTERNAL ONLY
+template<typename T, typename U>
+struct is_mpi_datatype<std::pair<T, U> >
+  : mpl::and_<is_mpi_datatype<T>, is_mpi_datatype<U> > { };
+
 } } // end namespace boost::mpi
 
 #endif // BOOST_MPI_MPI_DATATYPE_HPP
diff --git a/include/boost/mpi/detail/mpi_datatype_primitive.hpp b/include/boost/mpi/detail/mpi_datatype_primitive.hpp
index 82fbdb6..3c22245 100644
--- a/include/boost/mpi/detail/mpi_datatype_primitive.hpp
+++ b/include/boost/mpi/detail/mpi_datatype_primitive.hpp
@@ -9,7 +9,7 @@
 #ifndef BOOST_MPI_DETAIL_MPI_DATATYPE_OPRIMITIVE_HPP
 #define BOOST_MPI_DETAIL_MPI_DATATYPE_OPRIMITIVE_HPP
 
-#include <mpi.h>
+#include <boost/mpi/config.hpp>
 #include <cstddef> // size_t
 
 #include <boost/config.hpp>
diff --git a/include/boost/mpi/detail/packed_iprimitive.hpp b/include/boost/mpi/detail/packed_iprimitive.hpp
index a7be2bb..54881e6 100644
--- a/include/boost/mpi/detail/packed_iprimitive.hpp
+++ b/include/boost/mpi/detail/packed_iprimitive.hpp
@@ -9,7 +9,7 @@
 #ifndef BOOST_MPI_PACKED_IPRIMITIVE_HPP
 #define BOOST_MPI_PACKED_IPRIMITIVE_HPP
 
-#include <mpi.h>
+#include <boost/mpi/config.hpp>
 #include <iostream>
 #include <cstddef> // size_t
 #include <boost/config.hpp>
diff --git a/include/boost/mpi/detail/packed_oprimitive.hpp b/include/boost/mpi/detail/packed_oprimitive.hpp
index 2f1a889..84af42e 100644
--- a/include/boost/mpi/detail/packed_oprimitive.hpp
+++ b/include/boost/mpi/detail/packed_oprimitive.hpp
@@ -9,7 +9,7 @@
 #ifndef BOOST_MPI_PACKED_OPRIMITIVE_HPP
 #define BOOST_MPI_PACKED_OPRIMITIVE_HPP
 
-#include <mpi.h>
+#include <boost/mpi/config.hpp>
 #include <iostream>
 #include <cstddef> // size_t
 #include <boost/config.hpp>