diff --git a/CMakeLists.txt b/CMakeLists.txt
index b241a44..8c836e7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -51,10 +51,11 @@ if (${IS_GNU} OR ${IS_CLANG})
     if (NOT (MINGW AND ${IS_CLANG})) # llvm-mingw linux packages don't bundle openmp
         include(FindOpenMP)
         if (OpenMP_CXX_FOUND)
+            set(CMAKE_CXX_FLAGS "${OpenMP_CXX_FLAGS} ${CMAKE_CXX_FLAGS}")
             add_definitions(-D_GLIBCXX_PARALLEL)
         endif()
     endif()
-    set(CMAKE_CXX_FLAGS "-flto ${OpenMP_CXX_FLAGS} ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
+    set(CMAKE_CXX_FLAGS "-flto ${CMAKE_CXX_FLAGS} -pipe -fstack-protector-strong -fstack-clash-protection -funwind-tables -fasynchronous-unwind-tables -fexceptions")
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -ffunction-sections -fdata-sections -fmerge-all-constants -ftree-vectorize")
     include(CheckCXXCompilerFlag)
     set(CF_PROTECTION "-fcf-protection")