diff --git a/intern/cycles/device/device_cpu.cpp b/intern/cycles/device/device_cpu.cpp
index 93c63b9..3b12fcb 100644
--- a/intern/cycles/device/device_cpu.cpp
+++ b/intern/cycles/device/device_cpu.cpp
@@ -761,8 +761,10 @@ public:
 		int start_sample = tile.start_sample;
 		int end_sample = tile.start_sample + tile.num_samples;
 
+#ifdef __SSE__
 		/* Needed for Embree. */
 		SIMD_SET_FLUSH_TO_ZERO;
+#endif
 
 		for(int sample = start_sample; sample < end_sample; sample++) {
 			if(task.get_cancel() || task_pool.canceled()) {