diff --git a/src/include/OpenImageIO/simd.h b/src/include/OpenImageIO/simd.h
index e9ac56bc..75df545a 100644
--- a/src/include/OpenImageIO/simd.h
+++ b/src/include/OpenImageIO/simd.h
@@ -225,15 +225,15 @@
 #  define OIIO_F16C_ENABLED 0
 #endif
 
-#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