--- Makefile.config.orig	2017-08-24 10:43:43.000000000 +0900
+++ Makefile.config	2017-08-24 10:43:54.000000000 +0900
@@ -2,7 +2,7 @@
 # Contributions simplifying and improving our build system are welcome!
 
 # cuDNN acceleration switch (uncomment to build with cuDNN).
-# USE_CUDNN := 1
+USE_CUDNN := 1
 
 # CPU-only switch (uncomment to build without GPU support).
 # CPU_ONLY := 1