diff --git a/triqs/python_tools/py_stream.cpp b/triqs/python_tools/py_stream.cpp
index e60e2a75..537c3500 100644
--- a/triqs/python_tools/py_stream.cpp
+++ b/triqs/python_tools/py_stream.cpp
@@ -18,6 +18,7 @@
  * TRIQS. If not, see <http://www.gnu.org/licenses/>.
  *
  ******************************************************************************/
+#include <triqs/utility/first_include.hpp>
 #ifdef TRIQS_WITH_PYTHON_SUPPORT
 #define TRIQS_LIB_CPP
 #include "./py_stream.hpp"
diff --git a/triqs/python_tools/wrapper_tools.cpp b/triqs/python_tools/wrapper_tools.cpp
index b9b3b203..6b73929f 100644
--- a/triqs/python_tools/wrapper_tools.cpp
+++ b/triqs/python_tools/wrapper_tools.cpp
@@ -1,3 +1,4 @@
+#include <triqs/utility/first_include.hpp>
 #ifdef TRIQS_WITH_PYTHON_SUPPORT
 
 // REMOVE THIS