diff --git a/cx_setup.py b/cx_setup.py
index 3e8a1a541..a8ae0685c 100644
--- a/cx_setup.py
+++ b/cx_setup.py
@@ -79,7 +79,8 @@ def load_PyQt4_Qt(finder, module):
             print("Error building PyMca")
             sys.exit(1)
 
-cmd = "python setup.py install --install-lib %s --distutils" % PyMcaInstallationDir
+cmd = "python setup.py install --install-lib %s --install-data %s --distutils" % \
+              (PyMcaInstallationDir, PyMcaInstallationDir)
 if os.system(cmd):
     print("Error building PyMca")
     sys.exit(1)