diff --git a/attributs.py b/attributs.py
index 6918b81..6ae6df5 100644
--- a/attributs.py
+++ b/attributs.py
@@ -454,7 +454,7 @@ class loginShell(Attr):
     def parse_value(self, shell, ldif):
         with open('/etc/shells') as f:
             shells = [ l.strip() for l in f.readlines() if not l.startswith('#') ]
-        if (shell not in shells)
+        if (shell not in shells):
             raise ValueError("Shell %s invalide" % shell)
         self.value = shell