diff --git a/CMakeLists.txt b/CMakeLists.txt
index f5501cffe55ffa92fcd26c359bd059154bbe52c6..cb791a3486e8dbe78288dab17281e43f30e3b741 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -79,6 +79,7 @@ endif()
 find_package(OpenMP)
 if(OPENMP_FOUND)
     set(CMAKE_C_FLAGS "${OpenMP_C_FLAGS} ${CMAKE_C_FLAGS}")
+    set(CMAKE_CXX_FLAGS "${OpenMP_CXX_FLAGS} ${CMAKE_CXX_FLAGS}")
 endif()
 
 # ========================