diff --git a/parso/pgen2/parse.py b/parso/pgen2/parse.py
index f3d8c88..ac925a7 100644
--- a/parso/pgen2/parse.py
+++ b/parso/pgen2/parse.py
@@ -146,7 +146,6 @@ class PgenParser(object):
         self.convert_leaf = convert_leaf
 
         self.stack = Stack([StackNode(grammar._nonterminal_to_dfas[start_nonterminal][0])])
-        self.rootnode = None
         self.error_recovery = error_recovery
 
     def parse(self, tokens):