diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3110457628..bd91f8d376 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -169,8 +169,8 @@ if(WITH_OPEN_MP)
 	else()
 	    message("using OpenMP for Poisson 3d shell computing")
 	endif()
-	list(APPEND CMAKE_C_FLAGS ${OpenMP_C_FLAGS})
-	list(APPEND CMAKE_CXX_FLAGS ${OpenMP_CXX_FLAGS})
+	string(APPEND CMAKE_C_FLAGS " ${OpenMP_C_FLAGS}")
+	string(APPEND CMAKE_CXX_FLAGS " ${OpenMP_CXX_FLAGS}")
 	set(USE_OPEN_MP 1)
 endif()
 
diff --git a/include/general/CMake_defines.h.in b/include/general/CMake_defines.h.in
index 03edd6c1ac..6ae012e08b 100755
--- a/include/general/CMake_defines.h.in
+++ b/include/general/CMake_defines.h.in
@@ -11,7 +11,7 @@
 #define BIN_AUX_SUBDIR "@BIN_AUX_SUBDIR@"
 
 #cmakedefine __USE_JP2__
-#cmakedefine USE_OPEN_MP
+#cmakedefine USE_OPEN_MP  @USE_OPEN_MP@
 #cmakedefine NO_X11
 #cmakedefine __QT_5_SHORTCUT_PATCH
 #cmakedefine ETA_POLYGON
diff --git a/src/uti_phgrm/GpGpu/GpGpu_BuildOptions.h.in b/src/uti_phgrm/GpGpu/GpGpu_BuildOptions.h.in
index 7ff15bdc1e..4fe1a22151 100755
--- a/src/uti_phgrm/GpGpu/GpGpu_BuildOptions.h.in
+++ b/src/uti_phgrm/GpGpu/GpGpu_BuildOptions.h.in
@@ -1,5 +1,4 @@
 #cmakedefine CUDA_ENABLED @OptionCuda@
-#cmakedefine USE_OPEN_MP  @USE_OPEN_MP@
 #cmakedefine OPENCL_ENABLED  @OPENCL_ENABLED@
 #cmakedefine CPP11THREAD_NOBOOSTTHREAD  @CPP11THREAD_NOBOOSTTHREAD@
 #cmakedefine NVTOOLS  @NVTOOLS@