diff --git a/parso/python/grammar34.txt b/parso/python/grammar34.txt
index d4a32b8..5dc8c8e 100644
--- a/parso/python/grammar34.txt
+++ b/parso/python/grammar34.txt
@@ -7,16 +7,16 @@
 #        with someone who can; ask around on python-dev for help.  Fred
 #        Drake <fdrake@acm.org> will probably be listening there.
 
-# NOTE WELL: You should also follow all the steps listed in PEP 306,
-# "How to Change Python's Grammar"
+# NOTE WELL: You should also follow all the steps listed at
+# https://docs.python.org/devguide/grammar.html
 
 # Start symbols for the grammar:
 #       single_input is a single interactive statement;
 #       file_input is a module or sequence of commands read from an input file;
 #       eval_input is the input for the eval() functions.
 # NB: compound_stmt in single_input is followed by extra NEWLINE!
-file_input: (NEWLINE | stmt)* ENDMARKER
 single_input: NEWLINE | simple_stmt | compound_stmt NEWLINE
+file_input: (NEWLINE | stmt)* ENDMARKER
 eval_input: testlist NEWLINE* ENDMARKER
 
 decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE