diff --git a/build_files/cmake/platform/platform_win32.cmake b/build_files/cmake/platform/platform_win32.cmake
index 03895918e16..56801c4a4cf 100644
--- a/build_files/cmake/platform/platform_win32.cmake
+++ b/build_files/cmake/platform/platform_win32.cmake
@@ -674,7 +674,6 @@ if(NOT OpenImageIO_FOUND)
   set(OPENIMAGEIO_LIBRARIES ${OIIO_OPTIMIZED} ${OIIO_DEBUG})
   set(OPENIMAGEIO_IDIFF "${OPENIMAGEIO}/bin/idiff.exe")
 endif()
-add_definitions(-DOIIO_NO_SSE=1)
 
 if(WITH_LLVM)
   set(LLVM_ROOT_DIR ${LIBDIR}/llvm CACHE PATH "Path to the LLVM installation")