diff --git a/attributs.py b/attributs.py
index 746e5e9..6918b81 100644
--- a/attributs.py
+++ b/attributs.py
@@ -453,8 +453,8 @@ class loginShell(Attr):
 
     def parse_value(self, shell, ldif):
         with open('/etc/shells') as f:
-            shells = f.readlines()
-        if (shell not in shells) or shell.startswith('#'):
+            shells = [ l.strip() for l in f.readlines() if not l.startswith('#') ]
+        if (shell not in shells)
             raise ValueError("Shell %s invalide" % shell)
         self.value = shell