diff --git a/saml/schema/base.py b/saml/schema/base.py
index f429eef..fbe64c6 100644
--- a/saml/schema/base.py
+++ b/saml/schema/base.py
@@ -446,4 +446,4 @@ def deserialize(cls, xml):
 
     @classmethod
     def fromstring(cls, text):
-        return cls.deserialized(etree.XML(text))
+        return cls.deserialize(etree.XML(text))