diff --git a/modules/mol/mm/pymod/antechamber.py b/modules/mol/mm/pymod/antechamber.py
index 979dd4d992ee29ccdc7a18ba83f5647f38485e26..0092f406c4a601d7d7796b59cee4820d65c4d792 100644
--- a/modules/mol/mm/pymod/antechamber.py
+++ b/modules/mol/mm/pymod/antechamber.py
@@ -21,7 +21,7 @@
 # field parameters. Allows the execution of Antechamber and the parsing of files
 # generated by it.
 
-import _ost_mol_mm as mm
+from ost.mol import mm
 import ost
 from ost import settings, mol, geom
 import os, subprocess, math