diff --git a/CMakeLists.txt b/CMakeLists.txt
index 924ec711f..cdf9feef8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -55,7 +55,7 @@ else()
       add_definitions(-DROCKSDB_JEMALLOC -DJEMALLOC_NO_DEMANGLE)
       include_directories(${JEMALLOC_INCLUDE_DIR})
     endif()
-  endif() 
+  endif()
   option(WITH_SNAPPY "build with SNAPPY" OFF)
   if(WITH_SNAPPY)
     find_package(snappy REQUIRED)
@@ -115,6 +115,11 @@ if(WIN32)
       set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx2")
     endif()
   endif()
+else()
+  option(WITH_SSE42 "build with SSE4.2" ON)
+  if(WITH_SSE42)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -msse4.2")
+  endif()
 endif()
 
 set(BUILD_VERSION_CC ${CMAKE_BINARY_DIR}/build_version.cc)