diff --git a/cuBQL/bvh.h b/cuBQL/bvh.h
index 1ab1941..86535bc 100644
--- a/cuBQL/bvh.h
+++ b/cuBQL/bvh.h
@@ -157,9 +157,7 @@ namespace cuBQL {
 # include "cuBQL/builder/cuda.h"
 #endif
 
-#if XXX
 # include "cuBQL/builder/cpu.h"
-#endif