--- setup.py
+++ setup.py
@@ -390,10 +390,12 @@ kw = {'name':"pycrypto",
                       include_dirs=['src/'],
                       sources=["src/CAST.c"]),
             Extension("Crypto.Cipher._DES",
-                      include_dirs=['src/', 'src/libtom/'],
+                      include_dirs=['src/'],
+                      libraries=['tomcrypt'],
                       sources=["src/DES.c"]),
             Extension("Crypto.Cipher._DES3",
-                      include_dirs=['src/', 'src/libtom/'],
+                      include_dirs=['src/'],
+                      libraries=['tomcrypt'],
                       sources=["src/DES3.c"]),
 
             # Stream ciphers
--- src/DES.c
+++ src/DES.c
@@ -28,8 +28,8 @@
  * assert-like LTC_ARGCHK macro fails. */
 #define ARGTYPE 4
 
-/* Include the actial DES implementation */
-#include "libtom/tomcrypt_des.c"
+/* Access the actual DES implementation */
+#include "tomcrypt.h"
 
 #undef DES  /* this is needed because tomcrypt_custom.h defines DES to an empty string */