diff --git a/CMakeLists.txt b/CMakeLists.txt
index df1f354..dbf5806 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,49 +1,49 @@
 cmake_minimum_required(VERSION 2.8)
 project(TensorContractor CXX)
 
 set(CMAKE_BUILD_TYPE Release)
 
 if(CMAKE_BUILD_TYPE MATCHES Debug)
 	message("Compiling in debug mode")
 	#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /DDEBUG")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
 	#set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wextra")
 elseif(CMAKE_BUILD_TYPE MATCHES Release)
 	message("Compiling in release mode")
 	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
 else()
     message(FATAL_ERROR "You must set CMAKE_BUILD_TYPE to either 'Debug' or 'Release'")
 endif()
 
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED True)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake/modules)
 
 # Usefull if MPIR (or other libs) is installed in the home directory
 list(APPEND CMAKE_PREFIX_PATH $ENV{HOME})
 
 find_package(MPIR)
 find_package(MPIRXX)
 if(MPIR_FOUND AND MPIRXX_FOUND)
   set(MP_INCLUDE_DIR ${MPIR_INCLUDE_DIR} ${MPIRXX_INCLUDE_DIR})
   set(MP_LIBRARIES ${MPIR_LIBRARIES} ${MPIRXX_LIBRARIES})
   set(MP_HEADER mpirxx.h)
   set(MP_CMAKE_MODULE "MPIR")
 else()
   message(FATAL_ERROR "Did NOT found MPIR")
 endif()
 
 find_package(MPI REQUIRED)
 
-include_directories(${MP_INCLUDE_DIR})
+include_directories(${MP_INCLUDE_DIR} ${MPI_CXX_INCLUDE_DIRS})
 
 # MPIR Stuff on windows...
 # set(MPIR_INC_DIR "C:/Libraries/cpp/mpir/msvc/vs19/dll_mpir_gc/x64/${CMAKE_BUILD_TYPE}")
 # set(MPIR_LIB_DIR "C:/Libraries/cpp/mpir/msvc/vs19/dll_mpir_gc/x64/${CMAKE_BUILD_TYPE}")
 # configure_file("${MPIR_LIB_DIR}/mpir.dll" mpir.dll COPYONLY)
 # include_directories(${MPIR_INC_DIR})
 
 add_executable(${PROJECT_NAME} main.cpp)
 #target_link_libraries(${PROJECT_NAME} PUBLIC "${MPIR_LIB_DIR}/mpir.lib")
 target_link_libraries(${PROJECT_NAME} PUBLIC ${MP_LIBRARIES} ${MPI_CXX_LIBRARIES})