diff --git a/libsrc/core/ng_mpi.cpp b/libsrc/core/ng_mpi.cpp
index b6adbe4c..66355a96 100644
--- a/libsrc/core/ng_mpi.cpp
+++ b/libsrc/core/ng_mpi.cpp
@@ -7,16 +7,16 @@
 
 #include "array.hpp"
 #include "ngcore_api.hpp"
-#include "pybind11/pytypes.h"
 
 #ifdef NG_PYTHON
+#include "pybind11/pytypes.h"
 #include "python_ngcore.hpp"
-#endif
 
 #define MPI4PY_LIMITED_API 1
 #define MPI4PY_LIMITED_API_SKIP_MESSAGE 1
 #define MPI4PY_LIMITED_API_SKIP_SESSION 1
 #include "mpi4py_pycapi.h"  // mpi4py < 4.0.0
+#endif
 
 #ifdef MSMPI_VER
 int MPI_Comm_create_group(MPI_Comm arg0, MPI_Group arg1, int arg2,
diff --git a/libsrc/core/ng_mpi_wrapper.cpp b/libsrc/core/ng_mpi_wrapper.cpp
index 835b0c31..2611468c 100644
--- a/libsrc/core/ng_mpi_wrapper.cpp
+++ b/libsrc/core/ng_mpi_wrapper.cpp
@@ -6,7 +6,9 @@
 
 #include "ng_mpi.hpp"
 #include "ngstream.hpp"
+#ifdef NG_PYTHON
 #include "python_ngcore.hpp"
+#endif // NG_PYTHON
 #include "utils.hpp"
 
 using std::cerr;
@@ -94,6 +96,7 @@ void InitMPI(std::optional<std::filesystem::path> mpi_lib_path) {
       throw e;
     }
   } else {
+#ifdef NG_PYTHON
     // Use mpi4py to init MPI library and get the vendor name
     auto mpi4py = py::module::import("mpi4py.MPI");
     vendor = mpi4py.attr("get_vendor")()[py::int_(0)].cast<std::string>();
@@ -106,6 +109,7 @@ void InitMPI(std::optional<std::filesystem::path> mpi_lib_path) {
     mpi_lib =
         std::make_unique<SharedLibrary>(mpi4py_lib_file, std::nullopt, true);
 #endif  // WIN32
+#endif // NG_PYTHON
   }
 
   std::string ng_lib_name = "";
diff --git a/libsrc/meshing/python_mesh.cpp b/libsrc/meshing/python_mesh.cpp
index 52680229..11209a84 100644
--- a/libsrc/meshing/python_mesh.cpp
+++ b/libsrc/meshing/python_mesh.cpp
@@ -1,4 +1,3 @@
-#include "pybind11/pytypes.h"
 #ifdef NG_PYTHON
 
 #include <regex>