diff --git a/modules/mol/base/tests/test_numpy.py b/modules/mol/base/tests/test_numpy.py
index e496bf585758812ba1253ad646af6ccf17437046..8dc14835aac52fc28027d80a6c3e7c55c6c6e7dc 100644
--- a/modules/mol/base/tests/test_numpy.py
+++ b/modules/mol/base/tests/test_numpy.py
@@ -1,4 +1,5 @@
 import sys,unittest
+sys.path.append("../../../../stage/lib/openstructure")
 sys.path.append("../../../../stage/lib64/openstructure")
 from ost import *
 import numpy