diff --git a/src/include/OpenImageIO/simd.h b/src/include/OpenImageIO/simd.h
index d43dd496..8fe095c7 100644
--- a/src/include/OpenImageIO/simd.h
+++ b/src/include/OpenImageIO/simd.h
@@ -191,15 +191,15 @@
 
 // FIXME Future: support ARM Neon
 // Uncomment this when somebody with Neon can verify it works
-#if defined(__ARM_NEON__) && !defined(OIIO_NO_NEON)
-#  define OIIO_SIMD 4
-#  define OIIO_SIMD_NEON 1
-#  define OIIO_SIMD_MAX_SIZE_BYTES 16
-#  define OIIO_SIMD4_ALIGN OIIO_ALIGN(16)
-#  define OIIO_SSE_ALIGN OIIO_ALIGN(16)
-#else
+//#if defined(__ARM_NEON__) && !defined(OIIO_NO_NEON)
+//#  define OIIO_SIMD 4
+//#  define OIIO_SIMD_NEON 1
+//#  define OIIO_SIMD_MAX_SIZE_BYTES 16
+//#  define OIIO_SIMD4_ALIGN OIIO_ALIGN(16)
+//#  define OIIO_SSE_ALIGN OIIO_ALIGN(16)
+//#else
 #  define OIIO_SIMD_NEON 0
-#endif
+//#endif
 
 #ifndef OIIO_SIMD
    // No SIMD available