diff --git a/src/wscript b/src/wscript
index 66188da79..a75f7befe 100644
--- a/src/wscript
+++ b/src/wscript
@@ -217,7 +217,7 @@ def ns3_python_bindings(bld):
             source=("bindings/%s.py" % (module_py_name,)),
             target=('%s/%s.py' % (module_target_dir, module_py_name)))
         extension_name = '_%s' % (module_py_name,)
-        bld.install_files('${PYTHONDIR}/ns', ["bindings/%s.py" % (module_py_name,)])
+        bld.install_files('${PYTHONARCHDIR}/ns', ["bindings/%s.py" % (module_py_name,)])
     else:
         extension_name = module_py_name
 
@@ -275,7 +275,7 @@ def ns3_python_bindings(bld):
             pass
     pymod.env['DEFINES'] = defines
     pymod.includes = '# bindings'
-    pymod.install_path = '${PYTHONDIR}/ns'
+    pymod.install_path = '${PYTHONARCHDIR}/ns'
     return pymod