diff --git a/attributs.py b/attributs.py
index e79cce1..746e5e9 100644
--- a/attributs.py
+++ b/attributs.py
@@ -51,7 +51,7 @@ def attrify(val, attr, ldif, conn, ctxt_check = True):
     if isinstance(val, Attr):
         return val
     else:
-        return CRANS_ATTRIBUTES[attr](val, ldif, conn, ctxt_check)
+        return CRANS_ATTRIBUTES.get(attr, Attr)(val, ldif, conn, ctxt_check)
 
 class Attr(object):
     legend = "Human-readable description of attribute"