--- a/cmake/UserOverride.cmake
+++ b/cmake/UserOverride.cmake
@@ -9,7 +9,7 @@
 if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
     # g++
     set(common "-Wall -Wextra")
-    set(CMAKE_CXX_FLAGS_RELEASE_INIT "${common} -O3 -march=native -funroll-loops -DNDEBUG")
+    set(CMAKE_CXX_FLAGS_RELEASE_INIT "${common} -O3 -funroll-loops -DNDEBUG")
     set(CMAKE_CXX_FLAGS_DEBUG_INIT   "${common} -g -ggdb")
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
     # icpc
@@ -19,7 +19,7 @@
 elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
     # clang
     set(common "-Wall -Wextra")
-    set(CMAKE_CXX_FLAGS_RELEASE_INIT "${common} -O3 -march=native -funroll-loops -DNDEBUG")
+    set(CMAKE_CXX_FLAGS_RELEASE_INIT "${common} -O3 -funroll-loops -DNDEBUG")
     set(CMAKE_CXX_FLAGS_DEBUG_INIT   "${common} -g -ggdb")
 elseif (CMAKE_CXX_COMPILER_ID STREQUAL "PGI")
     # pgcpp