diff --git a/CMakeLists.txt b/CMakeLists.txt
index 511ce66b06..d5018163f2 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -47,7 +47,6 @@ endif()
 
 if(OPENMC_USE_MPI)
   find_package(MPI REQUIRED)
-  include_directories(${MPI_CXX_INCLUDE_DIRS})
 endif()
 
 #===============================================================================
@@ -141,11 +140,6 @@ endif()
 
 set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 
-if(OPENMC_USE_MPI)
-  list(APPEND cxxflags ${MPI_CXX_COMPILE_FLAGS})
-  list(APPEND ldflags  ${MPI_CXX_LINK_FLAGS})
-endif()
-
 if(OPENMC_ENABLE_PROFILE)
   list(APPEND cxxflags -g -fno-omit-frame-pointer)
 endif()