diff --git a/OpenCL/m18100_a3-pure.cl b/OpenCL/m18100_a3-pure.cl
index 22083acf8..dcba543b5 100644
--- a/OpenCL/m18100_a3-pure.cl
+++ b/OpenCL/m18100_a3-pure.cl
@@ -3,7 +3,7 @@
  * License.....: MIT
  */
 
-#define NEW_SIMD_CODE
+//#define NEW_SIMD_CODE
 
 #include "inc_vendor.cl"
 #include "inc_hash_constants.h"