diff --git a/intern/cycles/kernel/kernel_sse2.cpp b/intern/cycles/kernel/kernel_sse2.cpp
index cfadb02b93b..59852a31047 100644
--- a/intern/cycles/kernel/kernel_sse2.cpp
+++ b/intern/cycles/kernel/kernel_sse2.cpp
@@ -22,7 +22,7 @@
 
 #ifdef WITH_OPTIMIZED_KERNEL
 
-#define __KERNEL_SSE2__
+//#define __KERNEL_SSE2__
 
 #include "kernel.h"
 #include "kernel_compat_cpu.h"