diff --git a/setup.py b/setup.py
index a48af62..e69752a 100644
--- a/setup.py
+++ b/setup.py
@@ -32,11 +32,11 @@ def setup_package_pyscaffold():
                                  'wafo/source/mvn/mvndst.f'])
     extensions.append(mvn_ext)
 
-#    mvnprd_ext = Extension('wafo.mvnprdmod',
-#                           extra_objects=['wafo/source/mvnprd/mvnprd.f',
-#                                          'wafo/source/mvnprd/mvnprodcorrprb.f'],
-#                           sources=['wafo/source/mvnprd/mvnprd_interface.f'])
-#    extensions.append(mvnprd_ext)
+    mvnprd_ext = Extension('wafo.mvnprdmod',
+                           sources=['wafo/source/mvnprd/mvnprd.f',
+                                    'wafo/source/mvnprd/mvnprodcorrprb.f',
+                                    'wafo/source/mvnprd/mvnprd_interface.f'])
+    extensions.append(mvnprd_ext)
 
     mreg_ext = Extension('wafo.cov2mod',
                          extra_objects=['wafo/source/mreg/dsvdc.f',