diff --git a/modules/mol/mm/pymod/antechamber.py b/modules/mol/mm/pymod/antechamber.py
index 4776b2a96a986ecb82a0fc399a6fa557f3330bdd..6fc48ce3f38effb6e1a92683e1ec0e31d318c326 100644
--- a/modules/mol/mm/pymod/antechamber.py
+++ b/modules/mol/mm/pymod/antechamber.py
@@ -228,6 +228,10 @@ def _ParseAmberForceField(filename):
       ff_dict[keyword] = []
       line = in_file.next()
       while len(line.strip()) > 0:
+        # check for warnings
+        if 'ATTN' in line:
+          ost.LogWarning('The following line in ' + filename + ' (' + keyword +\
+                         ' section) needs revision:\n' + line.strip())
         # fixed column format -> extract entries dep. on current keyword
         if keyword == 'MASS':
           atype = line[0:2].strip()