diff --git a/SConstruct b/SConstruct
index 17b1009..f8e5f3d 100644
--- a/SConstruct
+++ b/SConstruct
@@ -1,6 +1,7 @@
 # -*- python -*-
 import os
 import os.path
+import platform
 import sys
 
 
@@ -34,6 +35,8 @@ if 'DESTDIR' in env:
 
 
 env['libpath'] = calcInstallPath("$prefix", "lib")
+if env['PLATFORM'] != 'darwin' and platform.machine()[-2:] == '64':
+    env['libpath'] += '64'
 env['incpath'] = calcInstallPath("$prefix", "include", "hammer")
 env['parsersincpath'] = calcInstallPath("$prefix", "include", "hammer", "parsers")
 env['backendsincpath'] = calcInstallPath("$prefix", "include", "hammer", "backends")