diff --git a/samples/cxx/SConscript b/samples/cxx/SConscript
index 58dd807d4..d0b0de2b4 100644
--- a/samples/cxx/SConscript
+++ b/samples/cxx/SConscript
@@ -28,8 +28,8 @@ for subdir, name, extensions, openmp in samples:
 
         localenv['cmake_extra'] = """
 find_package(OpenMP REQUIRED)
-set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS})
-set(CMAKE_EXE_LINKER_FLAGS ${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS})
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${OpenMP_CXX_FLAGS}")
+set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${OpenMP_EXE_LINKER_FLAGS}")
 """
     else:
         localenv['cmake_extra'] = ''