diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6a1a301..3986491 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -37,7 +37,7 @@ if (WIN32 AND NOT MSVC)
     if(CMAKE_SIZEOF_VOID_P EQUAL 4)
         set(CMAKE_RC_FLAGS "${CMAKE_RC_FLAGS} -F pe-i386")
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=i386 -mtune=generic -mno-sse -mno-sse2 -mno-mmx -mno-3dnow")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=i386 -mtune=generic -mno-sse -mno-sse2 -mno-mmx -mno-3dnow")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=i386 -mtune=generic -mno-sse -mno-sse2 -mno-mmx -mno-3dnow -DATOMIC_FORCE_NO_ATOMICS")
     else()
         set(CMAKE_RC_FLAGS "${CMAKE_RC_FLAGS} -F pe-x86-64")
     endif()